During and After the Race:
- Maybe ask a friend to video your ride, especially if it's a short time trial. I hate videos of myself...but refer to them a lot when I'm evaluating things. They are useful. It's a bigger ask to have someone record a long TT or bunch race.
- Find the board where the results are posted and take pictures of results for your group (and others if interested). For time trials, the results posted there will often have the splits which are helpful in your progress as a racer and when you evaluate your competition...who will likely be your competition next year, too. The website only shows your final time, and the USA Cycling website will often screw that up, too and just show your final place and no time.