I realized this morning that many of the biggest changes in Startups and VC over the past ten years (2004-2014) have come about in part because of public writing and community building.
I would put the YC and 500 Startups movements in that camp, and the emergence of vibrant startup hubs in NYC, LA, and Boulder, and the juggernaut that is A16Z.
If you want to make a splash and create something new, writing publicly and building a community around that is one important part of the playbook.