I'm analyzing all the early stage companies I've worked with and where I added the most value. Below are some of my conclusions, plus things that I have seen other good active investors do.
Clean up cap table. Or better yet, don't clean at all - force new companies
Take one strong view, rather than a few weak views
Only working with new entrepreneurs = less shit to deal with
Be extremely forceful and active with solving problems
Establish faster cadence
Force better communication
Market the hell out of their companies
Connecting companies to the right people to the right time
Give companies the space to be creative, ambitious, and make mistakes
Step away when you can't exert influence and add value
Thanks to David Cohen, Jens Lapinski, Marvin Liao, Doug Scott, Eileen Burbidge, Jon Bradford, and Carlos Espinal for providing great role models.