One thing on Twitter that will help you is to use proper hashtags for stuff. #indiedev #indiegame #gamedev are nice ones for regular posts about your game. Participate in #screenshotsaturday, try to use #ff or forward friday to find new people to follow and to promote people you follow to others. Try getting youtubers /…
Like 2cat said it doesn't hurt to religiously put #gamedev and #indiegamedev at the end of your tweets. Just started usin' the twitter myself and i'm getting about a follower per tweet this way, but odds are they're just bots mindlessly following things for their own self promotion. Posting to these main channels is sorta…