Here's an interesting one. Sign up at Swagbucks below and use it as your search engine (I think the underlying engine is google, who shares ad dollars with SB, so your search results are the same.). The site randomly gives you "Swagbucks," which can be exchanged for cash, gift cards, etc. I've made about $125 from the site and haven't noticed a deterioration in my search results. You also get Swagbucks for watching videos, signing up for offers and other fun stuff. I mostly do searches and videos.
Sign up below by clicking on the banner ad and they'll credit you with some sort of sign-up bonus. Full disclosure: I may get some sort of credit if you sign up here. Or I may not. I haven't quite figured out how that part works yet.