Revtwt (recently re-named from Twtad) is a great way to do a few extra tweets a day and get paid for them when people click on your ads - kind of Adsense for Twitter.
If you have lots of Twitter followers, this could be a fantastic earner for you.
Plus, if you refer other people to Revtwt, you get a percentage of their earnings.
Signing up is easy, just go here http://revtwt.com/index.php?id=10455
Rex Harris, who is a very well known and reputed networking expert recommends that you use the Twitter hashtag feature to boost your marketing efforts.
By watching the 'Trending Topics' in the Twitter sidebar AND using popular search terms, you can reach a much bigger audience, and find people who may be interested in the products you offer.
If you really have something to say that might help them, you can use a 'reply' with their name in and including something about YOUR topic and YOUR promotional URL.
For instance when I finish this post, I'm going to post a tweet with the words #blog and #marketing in it.
Have a profitable Tweeting week!