Fast Leveling - Sneak and One-Handed (Exploit)
Before you leave the cave during the "Unbound" quest when you get to the are with the bear (DO NOT KILL THE BEAR!!) go into sneak and equip a dagger. Attack the NPC you chose to follow. The bear will stand up but this does not matter, wait until it says you are hidden then do it again. You can get Sneak and One-Handed to level 100 Depending on how much patience you have.