Take The Bait - A blog about building your MVP & finding your first customer
Startup School - How to start a startup, by Y Combinator
Launch Library - Hundreds of resources on how to launch literally anything
YC World - Explore Y Combinator companies by country
Lean Canvas - Business plans take too long to write, are seldom updated, and almost never read by others but documenting your hypotheses is key. Lean Canvas solves this problem using a 1-page business model.
Apply to YC (Y Combinator) - Curated collection of resources for founders applying to YC.