RE: Define REST for me please
sleep well but I wouldnt worry too much about not using your muscles unless competing. As otherwise thats like buying a real nice car but never driving it and only ever polishing it.
You should sleep until you wake naturally and goto bed the same time every night. In reality this is often not possible but just do the best you can. For some ppl this may be 6hrs, others it maybe 9hrs. Of course the time you need in bed sleeping will vary depending on how tired you are.
Remember dont let BB get in the way of enjoying life, you need balance.