Card magic isn’t always impressive, but is fun to perform. One main principle to go by is never perform a trick unless you can do it without even trying. Sleight of hand always strikes a wow across the face of your audience. If it is just something you feel like doing for fun, go on youtube and look up some card tricks or sleights. But if you are serious you should pick up a book such as the card college series or the magic book by Harry Lorane. Just keep practicing and don’t give up. Pretty soon you will start realizing how magicians such as David Blaine perform their tricks.