Card Trick #1: Cards of Same Suit Always in Order

For this trick, you'll need all 13 cards of the same suit, sorted in order.
You'll be dealing out the cards, and your friend will help you mix them up. When he says "Deal", you'll deal out one card face down. When he says "Double deal", slide the top card under the next card, then deal them both together.
This gives the impression that the order has been changed, but in reality, it's the same as dealing two cards separately - leaving the order untouched.
Once all the cards have been dealt, turn the cards over to find them all still in order.