How to Earn on Each Site
All of the sites offer multiple ways to earn. They range from logging in to watching videos to completing offers. So the best way to help you is to describe each site individually. Right now I am currently making videos to showcase these sites and I should have them up in a few days.
Points2shop and Cashle
Plain and simple the quickest way and most efficient way to earn on here is by completing their free offers but don't let that discourage you. You can also earn by playing games, like solitaire and racing, watching videos, winning their lottery. They also offer external offers that have you complete tasks or fill out surveys. I recently set up a new section of the website that offers answers to some of the Crowdflower Tasks. For those answers just visit the Forum.
Swagbucks
Swagbucks is very simple. You get rewarded just for having their toolbar installed. Also just use their search engine and you can earn their as well. Swagbucks typically has Swagcodes active as well so all you have to do is find them and redeem them to earn. Finally my personal favorite, you can earn by selling your old electronics. Sure you do not get the most competitive prices but you do get back a little. Just like points2shop they offer external tasks that you can complete. Once again for answers to some of the Crowdflower tasks just visit the Forum.
Lockerz
There really is no other way to describe how you earn other than watching videos. You also earn by logging in and answering daily poll questions. It takes a while to earn your PTZ. Finally you can earn by doing your online shopping on the site.