I find that twitter is not the best source of traffic right now. I am only converting about 1% of my followers into traffic. With only 3000+ people following me that's not too much traffic.
I don't spam. I tweet about 5-10 times per week and half of those tweets are informing people about a new blog post. The other half of my tweets are links to resources or tips.
I hear all these people saying that twitter is a great traffic resource. Am I missing something?