For the last week I have received prizes in the mail, by Fed Ex or UPS. They consisted of $50 from McDonalds, a blanket, a liquor chiller, a matching t-shirts for a person and a dog, dog treats, holiday rug, mechanical pencils, coupons for free products, etc. I take about an hour to bring up the list and enter them. I do this instead of playing games that don't result in free stuff like Farmville, Bejeweled, etc.
I also enter text contest through the local radio stations and stores. I can have 1500 texts a months with my phone plan so I am not worried about there being a cost. Local contests are easier to win then nationwide. I win tickets to local events and movies with local contests.
You'll notice alot of the sweeps are through Facebook. That is the way things are going lately. You usually have to like the company before you can enter the sweepstakes. No worries, just go back and unlike them when the contest is over.
You may want to make sure you have the autofill turned on with your browser. This will make it so much easier to fill out forms with your information. Even if you do have autofill, you may still have to fill some out manually, it just depends on the website.
Last piece of advice, create an email address just for use with coupons and sweepstakes. This way you are not getting junk mail in the email you use for everyday or professional reasons. Hotmail, gmail and yahoo all offer free emails. It can be as simple as sweepssmith or couponjones.
Hope this helps you get started. Have fun and win big. Let me know if anyone wins anything exciting.