I did do a search for rested...but all I get is werewolf threads back.
I want to know what the big deal is about sleeping. What is the rested perk??
like said above it increases the rate of your learning skills. It's really useful if you, say, fast travel to whiterun because you are going to do a smithing/enchanting/alchemy level session after you've gathered your ingredients, but you roll in at like 3 AM (which happens to me all the time).
So, pop in your house, sleep for 4-5 hours, come out and power craft and now you can actually sell at least some of your gear on the spot as opposed to lugging it all around.