The Single Biggest Mistake You’ll Make as a Founder. Again and Again.

Summary

Jason Lemkin argues that the single biggest mistake founders make is tolerating mediocrity in senior team members—co‑founders, VPs, and partners—because it silently drains time, resources, and momentum. He breaks down three deadly forms of mediocrity, quantifies their hidden costs, and promotes an "upgrade mentality" of hiring A‑players, setting crystal‑clear metrics, and swiftly cutting underperformers. Practical actions include using long‑term vesting to test co‑founder commitment, giving VPs 90‑day performance windows, and terminating weak partnerships within a quarter. By eliminating mediocrity, founders can refocus on recruiting top talent, closing strategic deals, and building great products.