I went through a while of forgetting to take my necklace off, that a few people have mentioned. So that's a big thing to watch for.

Now that you have a bolt snap on it make sure you *always* clip it off when it is not in your mouth or otherwise secured well. I forgot this a bit at the start and dropped my second stage a few times. Other people who've borrowed my regs have done the same and it is not nice to hear the whack as it hits the ground or other solid surface... I do mod-S drill now before every dive too. Have fun on your trip