One thing I like about Blog giveaways is you know how many people have entered based on how many comments there are--so when you find one without many comments your chances of winning are good. The following giveaways I found are ending soon and have less than 50 comments (at least last time I checked).
The Last Christian by David Gregory (34 comments)
Rad Dad T-Shirt (30 comments)
Little Looster Potty Stool (35 comments)