Neobux in my opinion is one of the best PTC sites out there. They are honest and pay instantly when you reach your cash out balance. You can do a quick google search and see that they are often rated the best PTC site on the net.
Most of the ads on this PTC (paid to click) site are worth .01 some are only worth .005 and others are worth a bit more. I know this doesn't sound like much but over time it will add up. They also have a few options to increase your earnings such as the ability to rent referrals and participate in different drawings.
Tip Check the site several times through out the day..new ads are constantly being added.