I agree with Goba. Don't try to be a walking stand-up comedian. Instead, be someone interesting with a style that is congruent with your personality. And interesting doesn't mean being able to recite of dozens of snapple fun-facts.
For example, I am naturally a little quirky, so I use a lot of running jokes, roleplay, and elementary school games to hold her attention and further our interaction. If i were to describe myself in one word, I am PLAYFUL. This is my style. But not only am I playful, I am CONFIDENT, RESPECTFUL, and THE LIFE OF THE PARTY.
Here's just a few of my "tools" that I used recently to keep me interesting.

- Played flicks with a girl after I finished my beer. After I won, told her that I was on the 2002 United States Olympic Beer Tab Flicking team.
- Created a complicated secret handshake with a chick. Teased her when she forgot it.
- Convinced a girl to come on vacation with me later that week (not really). Told her that the plane was fully booked, but that I would try to fit her in a suitcase and check her as luggage.
*This playful attitude is integrated into normal, sincere conversation.
You get the idea. No need for canned stuff. Just find what works best with your personality.
Hope this helps,
white_knight