Learning the intricacies of Adobe Photoshop is no easy task. You would have to depend on online tutorials or workshops in order to be adept at it. What if you are not the techie type to begin with? It would be awfully hard for you to do image post processing in any of your photos if you do not know how to use Photoshop. But the power of the Internet paved the way for such great web technologies like image post processing online, and all it takes are just a few clicks here and there.
www.2DBin.com is a free service that automatically post processes any image you upload. You will be given a number of post processed images after the upload and you can then download any of those post processed images that you like. They also have a feature called manual post process and you will be given 3 free credits upon signup.
Check it out and let me know what you think!