I agree with the above. If you can set up in front of an audience then great. I personally like to do a few tricks, but they have to flow into one another. For example, if you do a trick that leaves you with a card face down, why not do another trick where the mate of their chosen card is face down? Be creative. Do some cards, break the monotony with sponges or money, bring out the deck again (Nobody said it had to be the same deck, hint hint). Do a few more card tricks, throw in a packet trick.
Now making a routine is a complex thing, simply because you want to have a common theme. I have a full routine with the aces. I will actually tell you what I do, feel free to use it since I will not tell you the names of the tricks, simply the end results. I start producing the aces in some fashion, losing them in the deck then finding them again (often having the spec find them). I then use the aces in several other tricks, finding cards or morphing them into other cards. Regardless, when you are doing tricks, try to be entertaining, do not steal away from the audience reaction (i.e. when they begin reacting SHUT UP! let them react). Do not forget, what we do, even if simple is very dependent on presentation, as I mentioned, when you put cards in your pocket, then do a different trick, and then pull the cards out, who says you have to bring up the same deck? be creative, and more than anything HAVE FUN