This is one of the easiest and possibly, funnest ways to get free stuff. There are a few point based websites which will award you points for doing things like downloading their toolbar and searching with it.
Swag bucks is my favorite search and win site. You can download the toolbar for easy access, you get 4 points guaranteed every day from the NOSO, taking the daily poll, checking for surveys and for using the toolbar. Typically if you use the search engine like Google (results come from Google and Bing) you will get about 3-4 search wins per day, and every Friday is megabucks Friday and they give away 1,000,000 swag bucks, also they do other things such as hold Twitter contests and you can find swag codes which can be redeemed for points. It took me a week to get three 5$ Amazon.ca gift cards, just cashed out out my 4th today actually.
Mypoints is another search and win I like, this one you need more points to cash out for thing but you also get tons of points. Up to 75 points a month just for doing so many searches. You can choose to get paid to do surveys, read emails and occasionally they have fun stuff like games (daily spin n' win). You can shop to get points as well, also coupons are available as well, this site has a lot going on, many ways to earn points and get rewarded.