One of the best stress-relievers I know before a race is to spray down the car with windex and wipe off each panel. A spray bottle of somewhat diluted windex seems to work best and is cheap.
I keep the car on jackstands between sessions unless there is a real quick turnaround so that tires and brakes can be checked(I started racing with RX3's and they needed constant maintenance to be fast)and do a quick bolt/nut check at the end of the day. You quickly learn which ones tend to loosen and to watch.
Hopefully this is all preventive maintenance and you will have time to watch or help someone else flail away at their car, regardless of national origin.