Fabian GiesenI have a soft spot for magic tricks where there's really not much of a trick and the performer does pretty much exactly what they say they're doing.
A beautiful example is Paul Gertner's "Unshuffled". https://www.youtube.com/watch?v=LlTF1Y4a888
YouTube
If you either know a bit about permutations or have done some SIMD programming before, you should be able to see exactly what he's doing (except for the finale) and, well, he's not lying.
All you need to do to perform most of this trick yourself is to grind perfect (Faro) shuffles (split deck exactly in half, then a riffle shuffle that perfectly alternates cards between the halves) in hand to the point where you can do 3 in a row reliably. Smoothly, in seconds. In front of an audience.
So, yeah. If you practice daily, you can usually get there within a year or two. Have fun.
You'll probably also need to go through many decks while practicing (and performing) because your odds of nailing this are best with a factory-fresh deck of cards and they tend to deteriorate before too long