While looking for some design articles I found a blog post http://www.bestpsdtohtml.com/psd-to-html-contest-by-pixelcrayons-tweet-win/. I found its concept quite attractive and it was also different from other contest. In this contest, one who tweet the post could win a 50 % discount on PSD to HTML conversion services that is sponsored by Pixelcrayons. What I like most in this contest is use of twitter as a promotional medium. Please share any other method of promotion like this while blogging.