Being a safety captain myself, I tried to look around for ideas at GKC for safety. There is quite a list of things you can do, most of which I probably don't even know/ haven't heard of. The team that won Safety in Kansas City (1764) not only had the supplies, but their entire team was trained in CPR. Obviously not everyone has the money/opportunity/instructor to do this, but there are certainly "watered-down" versions. Some things Team 1987 does (or would like to do) includes the following:
-Comprehensive First Aid Kit. (Best to have in the same shape you bought it in)
-BAKING SODA. Judges always ask about baking soda and what to do in case of battery acid spills.
-This year we included Eyewash
-Fire Extinguisher. Get one as big as you think you'll need
-Safety Manual/MSDS. What do you do if you spill that epoxy all over Bill? What happens if Suzy gets her finger chopped off?
-Brief training from EMT. Mostly just for competitions. Or all-out CPR training.
-Some teams stock a defibrillator
-Safety video/other media.
-Signs. The venue is crawling with "cable bumps" but people still trip.
-Nametags. Keep medical information, coach contact info, and a photo of yourself on nametags for the whole team. Even devise a system to tell people whether or not they can be in the pits. We had a colored dot in the corner: red means yes, black means stay out. Judges really liked them.
-And of course, a place to keep EVERYTHING. Especially the trash. And ESPECIALLY your coats; keep coats in the stands- your pit looks very cluttered very quickly with that pile of coats, pool noodles, laptop bags, backpacks, smuggled food, and the robot bag over in the corner.
Just some of the things we do/hope to do in terms of safety. Hope this helped.