Spells, Potions and Magical Devices for you wizards
1. Expecto Patronum -- Getting attacked by a Dementor is probably the last thing I'd ever want to happen to me, so this repelling charm is damn useful. Plus it's just awesome to scream real loud: \nEeeexpectoooo Patronuuuuum!
2. Accio -- The summoning charm that brings anything to you. Damn, wizards are lazy.
3. The Marauder's Map -- The magical map that shows exactly where someone is at any given time. It's only a matter of time before Facebook has the same.
4. Apparation/Portkeys -- Think how much better the world would be with apparition. No sitting in traffic jams, running late, waiting 45 minutes for the B-Bus. We'd have a lot more free time.
5. Scourgify -- If I could clean my room with the flick of a wand, I probably never would have been grounded as a child.
