The easiest way to earn some money is ...

I have TraffficMonsoon in mind. You can join for free, surf 10 ads and you have already start earning. You can buy ad packs which bring you daily revenue share. You can advertize your sites and businesses. This really is good and quality advertising. Give this one some real attention. Perfect for promoting new releases, and your other opportunities. You can use the traffic exchange for free, so there's no reason not to try this one out!