A few thoughts on what we have learned in our year and a half of 31SA ownership, which includes about 8 months of travel now and over 15,000 miles.
Keep your driver's side slide in until you get everything hooked up. It is so much easier to do without bending over and worrying about whacking your head in the slide.
Get some sort of corner pads for both slides. The corners are sharp, and they will cut your head, sooner or later; I found some nice ones that stick on permanently). And, I also put pipe insulation along the bottom edges, but you have to put them on for them to do any good
Wait until after the transfer switch kicks over to shore power before turning on big loads like ACs, electric water heater, etc. and don't turn them all on at once.
And most importantly, read your manuals. There is a lot in the bag, but you need to understand how things work, and keep it on the coach for reference. And don't be hesitant to call Tiffin if you have a question.....
I hope you enjoy your 31 SA as much as we have ours.