In the summer of 2019, I started to build Planleave, a SaaS product to manage time off days in an organization. I did it as a side project while working full-time as a software engineer at Buffer. Three years later, in 2022, I sold it. I’ve never worked harder on any side project than on Planleave. When I start any project, I usually go through the first honeymoon phase of absolutely loving the idea, but that fades away quickly, and I usually stop at that point.