Trying to find a way to market and sell an Idea

I am a new member and here recently I came up with some ideas that I would like to market and possibly produce for sell. They involve creating bookmarks to sell in bookstores along with a printed and laminated cheat sheet of world famous artists. I have contacted Barnes and Nobles for possible results and I am wondering if I am going about this the right way. If there are any suggestions please feel free to write.