One of the simplest card tricks that works purely by a mathematical formula (that no self-respecting magician seems bothered about learning or figuring out!). Basically, you deal out 21 cards in 3 rows of 7, ask the spectator to choose a card, but only tell you the row. Through a simple process the spectators card always ends up at a predictable position and you simply need to dress up the reveal with a clever performance of your choice.
The absolute beginners card trick. Many of you may know this but possibly not the reveal. Check out the second half at least, you may learn something useful. – magicalmaniac77