fast travel to high hrothgar and look for any of the monks praying in the thin hallway. before starting this make sure you bring a dagger. using a two handed weapon does make you go up levels a little faster but it increases the chances of you getting caught by the monk you are attacking. i used a glass dagger and continually beat DIFFERENT monks. it took me 30 minutes to reach level 100 from level 32. very easy cheat and makes your overall level go up like crazy. if you have any questions feel free to ask!

I don't use exploits, but you can also do this at the beginning of the game with that guy in Helgen when you are sneaking through the caves.

i used this just before doing dark brotherhood because killing the contract npc's is that much more fun lol.

Do you mean the guy that you are following?