This little exploit can be taken advantage of to jack your levels up to 30 (when the items you earn will be of top quality). Just make sure to complete the quests with vulnerable NPCs or they will not survive the pummeling from high level enemies.

Simply travel to Leyawin and activate the 'Whom Gods Annoy' quest. Get it to the point where the woman gives you her Daedric staff. Instead of going to the dungeon to get rid of it, keep it for a while. The Everscamps it produces are incredibly easy to kill, have weak attack, and never stop respawning. Any ideas yet?

Personally, I was a Knight of Leyawin and went to the White Stallion Lodge to do this. I then decided that I wanted to level my Hand-to-Hand. So I punched the Everscamps to death again and again. A mere 10 minutes later I had raised my Hand-to-Hand almost 15 points.

I think many people don't think that the Everscamps give you experience points, but in fact, they do. I then leveled my block, blade, and heavy armor skills by about 20 points each before completing the quest.