I leveled up 5 levels in about 10 minutes. I made my own class that has heavy armor, sneak, acrobatics, blade, and security as my major skills, and that is all I can remember. So I waited till everybody went to bed in the Mages Guild, went into sneak mode in the living quarters, and jumped around a lot. Then I did the rat quest for the Fighters Guild and just let the rats hit me to level up that way too. It was cool.
Courtesy of Lycanthrope
Proudly paired with: Blazin Torchic- No longer. He is banned.