Twitter for Business

Can anybody give me some hints and tips to affiliate marketing? i only got 1 sale last saturday (05/01/09) and i still need a little help on how to take action with people. Is it because of lack of time at the computer and using Bill Crosby’s Twitter traffic machine, or would i really have to sell it in person? I still have tech school and work. Anybody good in this area of marketing on the computer?

First I would like to tell that I am not a newbie website owner.
My site is 2 weeks old and gets 200-350 unique visitors a day – organic google. most of the leading keywords drive the traffic.
I am an SEO in my country and it is the first time to work abroad (global world).
I uses Digg, Stumble, Carnival , site directories, SE submissions, Propeller, google bookmark, technocrati and also comment on blogs.
I don’t take into account Linkedin, facebook and twitter- they drive 100 a day As the moment I stop promoting the site, these sources will dry out.
Now, I need a VALUE-ADDED advice from an SEO expert – how to step up the ladder to the 2000 daily organic visitors.