I usually promote my blog posts to my friends on Facebook and followers on Twitter. I started DonDoes30.com about 5 months ago and was coming up on my 100th posted article so I decided to do a giveaway.
The prize: $100. The catch: sign up for my weekly newsletter (to help build my list). I already have a couple of hundred people on my mailing list, but was pretty surprised when only an additional 5 (five.... FIVE!) people subscribed.
Maybe my imagination got the best of me because I expected them to be signing up in droves.
If people don't find $100 valuable, I don't know what else to offer them to entice them to sign up!