how do i go about selling my pictures

One good thing about photography is that there are more books about the business of photography than any other subject I know of. If you just want to make alittle extra cash then a great place to start is the "Photographers Market" It comes out every year and it is like a phone book for buyers of photography. I have the 2005 edition and it's almost 650 pages. You might find a year or two old edition in a used book store or I think it's about 25USD new. I am assuming you are in America. or you could hop around on the web and try to find this info but I think the PhM is a great place to begin, it has more info than anyone could use in several years.