Another useful resource would be something along the lines of "funded founders" dinners with companies you've invested in or really like in order to help them deal with growing the company. YC helps going from zero to funded, but what about after? The zero to funded is a 3 month process thing, but the growing after funded is an indefinite time period. Progression I see being useful:
YC/TechStars
OAF
What I described above.