It's really up to you. Its nice to have a routine handy. Here is a nice routine I like to do on people.
1. Card trick (forgot what its called.... its in one of Brad Christian's dvds)
deck is shuffled by you and/or spectator.... you spread the cards out over a table in random directions so it looks like a mess... tell them to point to a random card, then tell them to point to another random card, then one last, and to finish it you do one yourself... turn the cards over and its their card
then i go on about the fact i gave them the power of ESP and i say something like "Now I'm sure that sounds like a bunch of corny magician stuff you hear at a show or something. However, I'm going to prove that I gave you mental abilities" I then ask them to take a pen out
I get a loop on it
2. I tell them to wave their hands over it to make sure nothing is attached, I then move the pen with "my mind". It moves... people freak out.
By now I have people calling me a demon and just searching me everywhere to make sure I don't have any other cards or magnets. I then say that I am going to do the final test of mentalism. This will finally prove that they really do posses ESP.
3. Version 2 Stigmata
Done.
As long as you have a loop on, a deck of cards, and a business card, all 3 of these can be done on the spot completely impromptu. Of course if I'm doing this routine to someone in my school I would later tell them its obviously all an illusion. I don't want them to thing that I'm a demon sent from hell or something.
Plus I don't like acting like I have supernatural powers because that breaks the magicians code, so change some of the wording in that routine I gave you. As long as you know how these tricks are done, you will realize how easy this routine is.
Welcome to magic. You will blow people away. My suggestion?
www.ellusionist.com Get Brad Christian's DVDs, Stigmata, Loops, factory sealed, and bullet. After you mastered these and have some card experience from Brad, come back here and get Trilogy. I don't own it, however, I heard it is very good at teaching card tricks and flourishes. You'll be known as a magician by your fellow friends in no time. I hope you enjoy yourself and remember to practice. Magic is not something you can learn in 1 second and perform right after. Go to Ellusionist's forums, I'm pretty sure there is a whole section on there just for beginners.
-Doug