Well you could grind Conjuration by doing http://www.youtube.com/watch?v=LgAcKBuGlKI
That's what I did, except I still kept running through dungeons. Just kept casting it until I'd have to fight, and then just hot-keyed to my warhammer, clean house, and move on. Best of both worlds, really. Kind of like how I stock up on huge amounts of iron ore, and then just run from quest to quest casting Transmute endlessly, so I'd level both Alteration (slowly) and end up with ridiculous amounts of gold ore to make into ingots, and thus into jewelry.
Grinding any skill is always better when you can keep playing right on through it all, instead of what that video suggested.