Over at the Giveaway Project you get a chance to win $25.00 by simply taking part in a comment contest. This is a simple contest where you leave a comment on the blog and the winner gets chosen by a random number generator.
While this is not a way to save money it is definitely a way to make money online and all it requires is a few minutes of your time.
When you are done entering the contest you can browse the rest of the blog for something to read. Good luck!