I've had to push back on this provision in the past - the one where your employer now own all of your side projects. As a blogger and open source maintainer this is a deal breaker for me.

I always manage to get it altered, but it is such an annoying point of friction.

I'd love something like the YC safe financing documents but for employment contracts - a free resource with well vetted, well explained contract language so I can say "let's use this language from here" and everyone can get on with their lives.