Stick at it! I'm on twitter 24/7 and I've gained nearly 50k in followers. Tips? BE ACTIVE Follow, FAV, RT and REPEAT THESE PEOPLE WILL FOLLOW YOU BACK! Use scrapers to target users who meet your niche/market, follow them manually. Another important thing, FAV EVERYTHING in your newsfeed if the source is a followed user (not RT's) When they get the alert 9x10 I get a follow back. Then you can start exposing yourself to their networks. Oh and of course, post engaging content!