First (offical) tri of the season and ever!

I had my first sprint tri last December.  I kept it very basic so I wouldn't confuse myself.

I SBR in swim jammers and a swim shirt....compression type.  So I had no clothing changes.

Obviously for the bike you'll have your helmet and shades.  I did have a spare tube, co2, and levers on the bike.  With one bottle of water.

Hopped of the bike, slipped on running shoes and there you go.

I had no nutrition outside of water.  Not necessary for a sprint.  

For your first tri I would keep transition as simple as possible.  It surprised me how slightly confused I was going from swim to bike.  Maybe the word is overwhelmed.  If I had had a bunch of stuff sitting in transition, it would have been even worse.

So whatever you choose, make sure you practice, practice, practice it first.

What he said. I aslo take a towel and fold it in half, put all my stuff on it. I place it in front of my bike wheel.

Check out this:

http://www.beginnertriathlete.com/discussion/training/race-checklist.asp?

You probably won't need everything on the lists, but it's a good starting point.

Good luck.

Mark

This.  Keep it simple, particularly for your first race and particularly since it's a sprint.  I think people often over-think this.  You're going to swim a little, bike a little and run a little - that's it!  You're not attempting a lunar landing!  Bring what you absolutely need, keep it simple and enjoy the experience.  Good luck!