Twitter is an amazingly free to use site where "Like Minded" people go to share their tips, tricks, techniques, websites, blogs, software, programs, offers, etc. and gain "more" followers. Using Twitter to promote offers, ads, products, and so on is, as Epic Pita stated, to use hashtags in your posts. Hashtags are very important because they reduce your profile from being deleted for "spam" and it makes your opportunity readably shortened. I suggest that you promote only the things that you are "passionate about" because it's that important. Topics are good also. I mean, if you have an ebook <----- example -----> and you are wanting to sell this to people on Twitter, the worst thing you can do is to say it is FREE. Offer your item(s) as a "benefit" or "bonus" and you will get more likes and possibly "retweets" of your post, which will bring more subscribers (if you have or are building an email list), and you can have a "sales funnel" do all the selling of other opportunities to make more money. I suggest also that you do not tweet more than 3 times per day. If you do, there's a good chance your profile will get "red flagged" and that is not good.