The companies,and sites i go to for free things.

These are the best companies to try stuff free,but in return you have to give a review.
https://www.bzzagent.com
http://h5.sml360.com/-/di7
http://home.crowdtap.com/
https://www.pinchme.com
http://swaggable.com/


Now these are the sites i get free things and sign up for contest,and other things.
http://www.freebieninja.com/
http://hunt4freebies.com/
http://sample-squad.popsugar.com/
https://www.samplesource.com/soldout.php?site=us
https://splashscore.com


These sites you can sign up and do survey's,and get points to redeem them for  gift cards yes its true i have turned in point for Amazon,and Starbucks.

https://us.toluna.com/
https://www.bing.com/


There are other sites,but these are the ones i do.Alot of these site have FB another good way to decide if its right for you,and if you have the time.