Personally, I'd pick up an endgame book like Silman's Complete Endgame Course. However, in the book, he recommends not to try to learn Bishop + Bishop + King vs. King and Knight + Bishop + King vs. King because it takes a lot of time to master them and they will most likely *never* come up in your whole chess career. I know the basics of them, but I don't think you should worry about those.
please can someone help me i need to find a place on the internet where i can practice my endings. if you know of a site please tell me.. thanks..