Here are some places to enter your giveaways for additional promotion:
Cool Contests, Great Prizes at Contest Alley
All Things Bloggy
The Sweepstakes Wire
CashNet Sweepstakes
Contests for Mom
Giveaway Scout
Free Sweepstakes and Contest
Lucky Contests
WinPrizesOnline: Sweepstakes
Sandys Realm
Contest Hound
Free Gretchen