Episode Summary
Executive Summary: In this Advice Line episode, Lyft co-founder John Zimmer reflects on leaving Lyft, mental health, and building a new mission-driven consumer platform, then advises three founders: Shower Spa on US expansion, Ruckstar on inventory financing amid tariffs, and Slow Cocoa on burnout and employee ownership. The conversation centers on focus, testing, funding growth responsibly, and designing businesses that create positive human outcomes.
Main Topics: John Zimmer’s transition out of Lyft and new venture direction: Zimmer explains why he and Logan Green stepped away from Lyft, how leaving operating roles affected his identity, and why he’s now pursuing a new platform focused on consumer businesses with positive outcomes. Mental health, burnout, and founder sustainability: Zimmer discusses the pressure and fight-or-flight state he experienced at Lyft, emphasizing sleep, diet, exercise, and building personal systems that support long-term performance. Shower Spa: US expansion strategy and market focus: Alan Summerfield’s shower device business is advised to test use cases, focus on mobility first, and validate broader luxury and institutional demand before scaling into the US. Ruckstar: inventory constraints, tariffs, and financing growth: Terry Levy seeks guidance on funding inventory and navigating tariff-related disruptions; advice centers on inventory financing, pre-orders, and using customer demand to support capital needs. Slow Cocoa: purpose, scale, and work-life balance: Kobe Goodwin asks how to sustain himself while building a values-driven chocolate company; the discussion covers self-care, phone boundaries, purpose, and employee ownership/ESOP ideas. Focus, experimentation, and unit economics as scaling tools: Across multiple calls, Zimmer and Guy emphasize starting with one clear segment, using experiments to measure acquisition economics, and expanding only after validating demand and operations.
Key Arguments: Leaving a founder role can be psychologically difficult because identity and daily purpose are tied to operating the company; transition should be intentional and staged. Founder wellbeing is not separate from business performance; sleep, nutrition, and exercise are foundational to making better decisions and serving stakeholders well. For Shower Spa, the best path is to focus first on the mobility-need segment, then test adjacent segments like luxury users or dog washing using low-cost acquisition experiments. A small business entering the US should not automatically build full warehousing; using Shopify, Amazon, or 3PLs can reduce risk while learning market economics. Ruckstar’s inventory problem is a good problem if demand exists; financing can come from specialized credit funds, Shopify-style lending, or customer-funded pre-orders with transparent positioning. For Slow Cocoa, purpose-driven businesses can scale while protecting workers through profit sharing or employee ownership structures, but founders should also create boundaries and personal systems to avoid burnout. Building an ethical, profitable business that pays wages, tuition, and mortgages is framed as a meaningful societal contribution, not just a financial outcome.
Data Points: Lyft leadership transition: 2-year process - Zimmer and Logan Green moved from operating roles to the board and then left entirely over two years. Lyft users/workforce contribution: 3% of the U.S. workforce - Zimmer says about 3% of the U.S. workforce had earned on Lyft when he was leaving. Shower Spa sales volume: 2,500 units - Alan says the company sold about two and a half thousand units in roughly a year. Shower Spa revenue: $200,000 - Alan reports about $200K in sales from the UK market. UK care market: 500,000 care home beds - Mentioned as a large opportunity for institutional sales in the UK. UK supported living units: 1.4 million - Zimmer cites this as part of the accessible housing/care opportunity for Shower Spa. Ruckstar first-year revenue: $400K - Terry says the business generated $400K in its first year. Ruckstar employee count: 10 total / 3 full-time - Terry describes a team of 10 including contractors, with 3 full-time employees. Slow Cocoa operating history: 4.5 years - Kobe says the business has been operating just over four and a half years. Slow Cocoa team size: 3 full-time - Kobe says there are three full-time employees, with a fourth starting soon. Lyft driver earnings participation: 3% of the U.S. workforce - Zimmer notes this statistic while reflecting on Lyft’s broader impact.
Pivotal Quotes: "If I don't do that, if I don't get the necessary sleep, exercise, and nutrients, then I'm not going to be able to better serve all those different populations." — John Zimmer: On why self-care is essential to founder effectiveness and not selfish. "I would want to run a few tests on the different use cases." — John Zimmer: Advice to Shower Spa on validating mobility, luxury, and dog-washing demand before broader expansion. "You have to believe that your business is better when you are better." — Guy Raz: On burnout and personal sustainability for Slow Cocoa’s founder.
Implications: Founders should scale deliberately: validate one segment, test economics, and secure flexible financing before expanding. Long-term success depends as much on founder health and ownership design as on product-market fit.
From the Episode
To be safe and do well. So it felt selfish almost to take time for myself. But I think the main learning is: if I don't do that, if I don't get the necessary sleep, exercise, and nutrients, then I'm not going to be able to better serve all those different populations. So it's really, really basic, but in the storm, hard to see. Yeah, it's, I mean, absolutely critical. And I think we're going to probably talk. Bit more about that. Why don't we bring in our first call? Are you ready? Sounds good. All right. Welcome to the advice line. You're on with John Zimmer, co-founder of Lyft. Please tell us your name, where you're calling from, and just one line about your business. Hi, John. Hi, Guy. I'm Alan Summerfield. I'm the founder of Shower Spa, calling from Nottingham in the United Kingdom. And we're on a mission to make showers safer, easier, and more luxurious for everyone. All right, Alan, welcome. So glad you're listening in the UK. Shower Spa. Yeah. Spelled S.
So, I would say virtually all in that market. But we also get some people who are buying it to wash their dog. Oh, it's perfect for my dog. That's a really good idea. I cannot keep my dog still because I so this is perfect for my dog. Yeah, so I mean, my quick reaction is: I would want to run a few tests on the different use cases. So, now I didn't even think of until you said that the dog use case and the luxury use case to really understand kind of what's your cost per. Acquiring a new customer. And it feels like that could be easier to do it in your current home market and really understand the unit economics of, okay, I want to go find that luxury user, I want to go find that dog washer. But to understand those basic economics, I think, you know, in the way you asked that question, I don't know that you need to set up the warehousing yourself. You know, whether you think about using someone either like a third-party logistics solution.
About me and about the business, that it's around me and always percolating. And I think those closest to me appreciate that too. But there is dissonance that I'm not always so self-aware about in practice. John, you know, this reminds me of something. I'm going to remind you of a conversation we had a few years ago. But Kobe, I mean, you have to believe that your business is better when you are better. Once you accept and understand that, then you can start to figure out the The logistics, like the actual tactics that you have to do. And the reason why I say I alluded to something that a conversation John and I had years ago is because I think this is a simple hack that has really helped me, right? You have to decide that you are going to do the things you need to do every day to enable you to function well. And one of the things I made a decision to do was to brick my phone. And I know many years ago, John, you invested in a light phone. That phone, and I have one, it's a phone that's not really, it doesn't.
About How I Built This with Guy Raz
Guy Raz interviews the world’s best-known entrepreneurs to learn how they built their iconic brands. In each episode, founders reveal deep, intimate moments of doubt and failure, and share insights on their eventual success. How I Built This is a master-class on innovation, creativity, leadership and how to navigate challenges of all kinds.New episodes release on Mondays and Thursdays. Listen to How I Built This on the Wondery App or wherever you listen to your podcasts. You can lis...