I use swagbucks as my search engine all the time. I try to make sure I do at least 4-5 searches a day. You can do as many. or as little as you wish.
The SB add up pretty quickly too. I've been saving mine from the beginning of the year & now have 1860. I figured that we need a new TV for our BR (our old one is acting pretty funky), so I told DH that I would earn one through SB. I now need 1340 more SB to get the TV, but as long as it is not costing me anything out of pocket, I'm good.
They also have a $10 visa card for about 135 (IIRC) SB's.
There're a lot of prizes to choose from, and doing the searches is no problem, as long as you had to use a search engine anyway. They have a good one too - it is powered by Google & Ask.com - so you usually get good results on your searches.