This web site has a few articles on making rap beats and the drum samples for those songs, too. You can find information on swing, which is a musical concept that apparently makes drum samples and beats sound more human and less robotic, which is something you may want if you want to give the impression of a drummer. All in all, a bit of a poorly-put-together website in design, and a little bit better in content. If you are into making your own beats, then you should probably check it out as it may give you a piece of information you did not have yet.