Adding value on Twitter can be hard. It can be complicated. Twitter can sometimes be a really noisy place. You've got to cut above that.
1. Add value through helping and offering advice to fellow users on Twitter
2. Add value by sharing articles and leaving feedback on them
3. Join twitter chats for an easy way to add value
With these tips you'll be well on your way to providing the Twitter community with some value.
And I'm afraid being funny and useful are the only ways to get engaged, genuine followers that actually want to hear what you have to say.