I just cashed in for a $6.30 Amazon GiftCard today through Opinion Outpost.  It only took doing a couple of surveys to get to that point and only a few minutes each time. 

If you haven’t signed up for Opinion Outpost yet click on the link above and sign up today.  You can’t beat free money and if you aren’t interested in Amazon Giftcards they also will just mail you a check as soon as you get to $5.