I do a lot of improv and community theater, and thus almost all of my players are people I've done shows with. I've found that theater people (straight play or improv) all have that streak in them that inspires them to play (or try out) RPGs, so I'm constantly talking about my games and finding interested people and potential players.
If you like performing and have a theater near you, getting involved with shows allows you to meet new people/friends and once they find out you game (and wish to play D&D), you'll find yourself some players that way.