Until my lawyers started asking me questions I didn't even know I was supposed to do anything with them -- I just filed them away with all the other paperwork I knew I'd probably need sometime but didn't know what it was for. Honestly in my mind that goes under one of the bullshit administrative things I wish I could pay someone to take care of. If someone created a Zenefits for cap table management/investor relations, I'd be the first customer.
EDIT: I'm not just talking about cap table management (glorified spreadsheets). I want something much more comprehensive.