I've done a lot of martial arts through my life, and a lot of the little things I picked up a long time ago. Like always wearing a cup, and always wearing a mouthguard. And getting a custom mouthpiece from your dentist, as opposed to that cheap shit you get at Walmart.
Even little things that don't seem so serious. Like I always wear a rash guard under my gi, and always wear compression shorts. Keep tape and band-aids in my gym bag, ibuprofen for really sore or injured days.
Stuff like that. Over the years you will find small things that make a big difference. Lol, though it's always nicer to learn those lessons without having to lose teeth in the process.
14-4 Sig Bets