If you’re nobody, you have to follow other people on twitter for them to know who you are.
This is probably the most important twitter rule of them all to get more twitter followers and it’s actually the easiest one. But again, this takes time as well. If you’re not famous, the only way that someone else on twitter that you don’t already will follow you is by first following that person yourself. (Something else to note here is that a direct message can only go through on twitter if both individuals are following each other.)
When you follow someone else, there is a 17-37% follow back rate. You can follow up to 1,000 people per day until you follow 2,000 people. When you reach 2,000 followers, you can then follow more people. Make sense?
So, the key is to get to 2,000 twitter followers. You can get more twitter followers by following people, but also having conversation with people. The easiest way to have conversations of interest on twitter is to follow the people who your favorite followers follow.