Oblivion - Easy Level Up

This trick requires you have Conjuration as one of your main skills, and works best if you also have a weapon skill (i.e. blade, blunt) and destruction.

You'll need a summon spell ( I use skeleton because you can get it early in the game) and a weapon or destruction spell. Summon a skeleton and kill him using the weapon or spell that will effect your major skills and repeat this process. If you have block as a major skill you can train 3 skills at once, and if you combine sword fighting with magical attacks, you can even train 4 at a time.