The best is loot as much armor and wepons as you can carry, make sure you have plenty of soul gems and enchant everything before you sell it. Also you can work smithing and enchanting together.
Smithing daggers to enchant is THE fastest way....
to irrevocably break your character and turn him into an immortal god

I recommend leveling it naturally by enchanting weapons you looted in dungeons before selling (the ONLY use of petty gems), recharging staves/magic weapons (don't forget you can equip followers too!) with lesser & commons and enchanting your own (or follower) weapons & apparel with greaters & grands respectively.
You'll get to 100 eventually that way... and not too fast either.
I PLed my first character.....
never again.