Hey bgoetz,
I reckon it depends on how important the race is. If it's a regular local race, i won't do anything differently except have an easy day on the friday (as i have today and generally do most weeks), and just make sure to keep well hydrated and not hungry.
I'm racing tomorrow but smashed my legs tues-thurs this week so not sure if i'll be adequatley recovered to hang in there!
Normally, if it's an important race, you'll have planned your training leading into it, and the last couple weeks leading into the race, your duration is coming down and you're doing more short high-intensity bursts with good recovery, as race-specific training with the goal of having you peaking for the race. I guess the type of training depends on the details of the race. But your not going to increase FTP or endurance in the 2-3 weeks before a race, so you focus on improving top-end power and V02 as they train quicker, this is how i understand it
Nutrition wise people often talk about carb loading and this is something you might consider, the purpose of this is to ensure you have full glycogen stores in your muscles for maximum possible energy stores during the race. Sometimes i consider it enough to keep eating as per usual but reduced training load, has a similar effect.
This is my 2 cents, sure others will have more to add!
Sam