I'm always wary of contests to win free stuff, but the folks running MSSQLTips.com are legitimate (I write there as well) and they are offering another contest giving away a Kindle with 5 eBooks loaded on it. Please note, entering your name in the contest will sign you up to receive their free newsletter, which basically advertises the tips that are added daily. You can enter here:
MSSQLTips Kindle with eBooks Giveaway
The winner will be announced on August 17th, so make sure you get you name in before then!