$50 credit towards your adwords campaign
Right now you can get a $50 adwords coupon code by going to this website:
http://hillelstoler.com/2010/01/03/free-google-adwords-promotional-code-coupons-2010/
All that is required is to:
1) link the post to your blog
and
2) send your email with a link to your website or blog.
Its that easy.