I do a few reward sites and I also sell on Ebay -
My Points - my first site (been a member for 11 years!) I just received a $50 Landry's gift card which we will use at Yak & Yeti on our AK day. Super easy to use, I click on emails, online searches using their toolbar, do some surveys (even if you don't qualify they give you points

) and shop through them - they sometimes have bonus points for certain stores, love when they do 8+ points per dollar on Old Navy/Gap. Have redeemed points for hundreds of dollars worth of gift cards
Inbox Dollars - another super easy site. Just got my first check ($50), don't really remember when I joined but I think it was about 4-5 months ago. I click on emails, do searches and have done a few surveys/special offers.
Swagbucks - I do their basic point stuff (poll, have their toolbar, watch videos, play games, NOSO). I've been a member a little over a year and have so far redeemed $175 in
Amazon gift cards. I have used them for holiday gifts and for stuff we would need at WDW (sandals, new camera bag, sunblock etc).
Superpoints - I just do their emails and the big button. Not a big payout but have gotten a few (about $30) Amazon cards the last 6 months.
I don't spend very much time in any of these sites - I did become a Swagbuck-aholic the first few months

but I got tired of doing the tasks and surveys so now I just do the basics on all of them. Every little bit helps!