Si Stebbins (1867 - 1950) was a circus performer and the creator of a special way of ordering the cards in a deck so they can be used for excellent mentalism tricks. Here's a good intro video. Also, you can download Si Stebbin's Card Tricks and the Way they are Performed as a PDF.
Amazing Ace Sandwich
Hester23BearsCH is one of my favorite YouTube card trick teachers. In this video, he shows how to do the Amazing Ace Sandwich Trick, in which the spectator's chosen card disappears from between the two black Aces and reappears between the two red Aces. Watch the performance video here.
Dr. Daley's Last Trick
This is an excellent impromptu trick. It requires a double lift, but they are easy double lifts. I always include this trick in my routine. When you do this trick, make sure you put the cards in the spectator's hand.