Full-stack / web app development have a lot of moving pieces and these evolve at amazing speeds.
As a developer/startup how do you stay on top of your game with these evolving pieces ?
Im new to web development and looking for top 5 rules from battle-hardened developers, mainly, how do they keep evolving their products-teams-themselves ?
Edit:
Although I originally intended this question to full stack web development - answers from any domain developers are welcome.