* The race bib goes on the front of your shirt, not on your back.
* Less is Best when you dress. Your body warms up very quickly in a race and you will soon be despising that long-sleeved shirt.
* Stretching before a race or stretching before warming up offers you no value. Your brain might feel more prepared, but your body doesn't receive any benefit. Look into dynamic stretching if you want to do something before the run.
* If you want accurate timing and placing, only enter races with chip timing. Take this tip from me; the one who has been running for several years now, and due to a horribly organized race, realized the importance of chip timing.
Run on!