Do you have aTwitter account? If so, who are your favorite people to follow? Chances are it's not the people that are constantly spamming links and "deals." It's probably the people tweeting good content. The people that connect with you and bring something of value to the relationship. It might be a famous person with something funny or insightful to say, or a business colleague dishing out excellent advice. It's like life outside of the digital world--you decide which people to become friends with based on what benefits they'll bring to the relationship, and what you can offer them. Treat your Twitter account in the same way.
Whoever it is, there's a reason you follow them, a reason you like to read the things they write. Keep that in mind as you tweet your own content. If you want people to follow you, then you have to provide something they want.
Twitter is a great way to network with others. Make yourself worth following!