Normally, I don't tell my trade secrets, but for I'm feeling extra nice this morning... probably because I haven't gone to bed yet
As silly as it sounds, about 60% of the people you follow, will follow you back -- as long as you are in a related industry. Meaning, real estate agents probably won't follow you, but plenty of affiliate marketers will.
Search for similar, or kind-of similar folks and follow them... wait about a week, if they don't follow you back, delete and move on.
This is on my to-do list here soon, we had someone get over 200 people for our one product page in about a week, so I know it's possible.
You can follow me
http://www.twitter.com/ppcjohn