Encouraging volunteerism and activism instead of whining. Encouraging democracy and competition of ideas rather than splintering within our movements.
Something local, with friends or meeting new friends, that involves connections to larger organizations but is more than a gear in a large machine. Many small projects with human connection.
That's not an easy fill-in-the-blank. I think effective activist culture might remind us more of the percolating young component of startup culture — thinking hackathons, not billionaires.