The easiest way is to buy an auto follow/auto unfollow program that searches keywords in profiles and tweets Tweet adder, Tweet attacks and Birdy Adder are the current best. Just be sure to review the profiles, not get carried away automated tweets and to setup automated DM's for new followers. Use your account like a real human and not an automated bot to get real people involved.
The best way is to Constantly be posting on twitter. People follow you because they are interested in either your life, or maybe your holding a contest or something on there giving away a free prize. You need to advertise on your YouTube, Facebook, your website, it doesn't matter but the way to start is to try to get people interested and who cares if you have to go out and add people if you are not famous or big you have to start from nothing and build your way up.
You can buy or get as many spam followers as you want; but if they aren't interactin with you its pointless. You need to follow who YOU want to follow and just be YOU! If you Be yourself you will attract people like you or people interested in you. -C
The best way is to do it manually. Search for a keyword that is related to your twitter account. make money online or internet marketing or whatever you like. Follow the people that appear and wait for them follow you back. Repeat it daily.
Yeah exactly what i said....but if they don't interact with you and vice versa, then its pointless! Ya dig? -C
Just simply follow the peoples, they will automatically follow you. Avoid paid that is buying followers. Most of them are fake and they are not beneficial for your business. Follow only those who are able to give benefits to you.
Tweet in different topics. Use the tweet buttons you are finding in news and other websites and make related contacts. Mention and tell your opinion also tweet with the tags you see people follow each other.
use twiends or facebook groups/pages for this, but mostly you won't get targeted people from these methods.
Check out that site RealFansNow they have some great packages, and they're real followers. As the title indicates, you can also use them for facebook.