Interesting and Informative

I found this to be very informative and helpful:

http://www.trifitmultisport.com/pdf/time_trial_racing_equipment-best_bang.pdf

Here are some specific time savings over a 40 kilometer time trial course based on measured data:
1· 6 seconds saved for optimized aero position on the bike
2· 5 seconds saved for racing with a water bottle as opposed to not taking it along
3· 4 seconds saved for an aero helmet over a standard cycling helmet
4· 3 seconds saved for an aero bicycle frame
5· 2 seconds saved for using aero wheels
6· 1 second saved for cleanup details (cabling, brakes, etc)

There's a lot more in the article. Check it out.