how can i earn directly from my tweets,using a link shortner? I'm building a twitter account,i started yesterday and reached 500+ followers.How can i earn a constant income without the risk of getting banned?

there are a couple of cpa places that will let you use twitter traffic, I can't remember who they are but just look around the forums and you will find them.
Regards
Suave

Focus on some niche...make normal tweets about it few times per day. Put inside some tweets the affil link (shortened) and recommend that product or action.
Also it is good when you harvesting traffic within the same niche as you are posting.
Sorry for my English