And in response to Heyitsthemagicguy, one of my favorite mentalism effects is just doing a simple drawing duplication or using the acidus novus peek to "read someone's mind". I acutally used the added up numbers principle, the one that is like really old (it's also in 13 steps) on stage as a prediction effect, where I had three people write three random three digit numbers, had another add them up, and inside the box that was on stage the entire time was, rolled up, a prediciton that accurately matched the total; it just goes to show that sometimes simplicity is best. Touching on hoy is also really, really good, and I have been using Lift by derren brown a lot.