Here were my suggestions, generalized and tweaked as to not identify the asker.
1. Make sure you have a completed profile, avatar (logo), header photo, and background. Your Twitter background shouldn’t be clouds. Most of us are choosy and won’t follow eggs. See: “Baby Steps to the Tweet.”
2. Follow back. Unless they are spam, an egg, #TeamFollowBack, or porn, I follow. One thing I’ve learned in this business is that you never know who is behind the account, whom they know, or even where they live. All business is word-of-mouth, and social media just multiplies that. I have friends all over this country who have accounts that aren’t necessarily local, and we talk (and recommend each other).
3. Nerds like me have lists by geography and topic. Take advantage of the work we’ve done for you. For example, here is the list my primary personality has for my county. Follow those people. It’s a much better way to find new people than buying followers (which is spammy).