Courtesy of HeyItsFree.net, here's a little trick to get a free Swagbucks code: After logging into your account, click “Ways to Earn” and then “Special Offers.” Then click the blue box that says “No Obligation Offers.” Skip through all the offers shown to you (about five or so) and at the end, you’ll receive a free code! Granted, mine was only worth one Swagbuck when I cashed it in, but still, free is free.
If you're new to Swagbucks, it's basically a search engine that rewards you for searching with "swagbucks" that can be redeemed for Amazon gift cards and the like (45 Swagbucks = $5 Amazon gift card). Here's my referral link in case you want to join. It's free to join, and I've earned $30 in gift cards so far, so, you know, that's pretty cool.