PTR

PTR = Paid to Read
This method is also very simple.
All you need to do on this method is to 'read' E-mails.
You get some E-mails and need to click a link in the mail, and then wait several seconds until you get paid. you dont really have to read all the E-mail, just let the counter finish.
Most sites have a "Site Inbox" for you to use, so you won't get these advertising mails to your private E-mail box. Other sites send you E-mail to your personal E-mail address (which i personally dont like that much).

an example to a site inbox (of "No-Minimum"):























Most PTR sites are also PTC sites, because these methods are very similar.

Here are my recomendations (all of them are in PTC also):

DonkeyMails
No-Minimum
KazarianPtc