There are some great giveaways going on on the web right now! If you read my other blog, you know I have recently won 2 blog giveaways, and even received one of those items already. These things work!
But you do need to be selective and read the directions. Some simply require a comment. Some require you leave your e-mail address; make sure to use your alternate e-mail address and leave it in this format: name at server dot com. Otherwise, a spambot will find your e-mail and spam you. Some require that you do something, like go to the website of the giveaway product and pick the one you like.
Then you need to add the blog to your blog reader, or you might miss the announcement of who wins.
So here's a list of some giveaways. Again, be selective or you'll find yourself having to sign up for 600+ blogs :)