Muckless Muck by Jared Kopf

Holding a card in the palm so that it can't be seen is one thing: invisibly switching it into play is another thing entirely.

At no point in "Muckless Muck" do you palm a card: in fact, at no point do you use any difficult sleight of hand. Yet this routine will convince practically anyone that you have the uncanny card-switching skills of a seasoned crossroader.

The first phase can be done with any pack of playing cards: the second exploits a diabolical, precision-made gimmick.

Both phases are good, quick tricks on their own; together, they are a concise, effective, magical routine.