There are hundreds of PTC sites where people can get paid to read ads and complete simple tasks. But I will recommend you only the top & highest paying PTC sites available for worldwide users, personally I am earning from those sites.
You can easily earn $100 to $200 per month by clicking & reading ads or doing number of some simple tasks. You need to work only 10-30 minutes daily on these PTC sites.
If you have more time and need more income then you can also work on more online jobs along with PTC sites. Here are 3 recommended PTC sites where millions of people work & earn money.