You aren't going to get rich taking surveys. PineCone pays $3 per survey, and they send me 1 or 2 a week. That's only about $15-$20 each month, but it's worth it to me. That money might be what I use to buy a couple Kindle books, or to get a drink at Starbucks after grocery shopping.
I don't account for those little $3 checks in my monthly budget, so I let myself spend the money however I want. If you're interested in signing up with PineCone Research, click here to see if you qualify.