Anything specific you are looking for? We have had ours for about a year, it's been a great coach.
Get a new mattress - the stock one is awful
You can store brooms and mops behind the bedroom door (just slide it out, put them in and close it again.)
A sewer pipe holder made out of a 5x5 fencepost and some plastic gutter can be placed above the propane tank to keep it out of a compartment
Don't forget to strap the fridge closed before driving (if you have the residential)
A portable space heater is a great alternative to the furnace (if you are hooked up)
LED lights are a great addition (there were some standard and we changed out some)
Make sure to leave the engine running (or start it) when raising or lowering the stabilizing jacks
Get a new showerhead - the oxygenics one is great, and they even have a newer one that I think is fabulous!!!
TPMS - get one if you don't have it (TST 507 is a good one)
You can turn both the driver and passenger seats 180 degrees - the lever is on the right side of both chairs. You may have to lean it forward to get it spun around the steering wheel, but they will both turn (if you have the barrel chair option behind the passenger, I don't think it will work, but euro chair that you can move, yes)
That's all off the top of my head - let me know if you have something specific.
This is a great forum for getting information.
Garren