How do you level up quickly in skyrim V on PC but without using cheats?

Answer 1

It depends entirely on what skill you want to train. Combat skills don't really have a fast training method. The best you can do is wear enough armor that you can soak up a lot of damage and use fast underpowered weapons. Thus you take a lot of hits (leveling up armor) and deal lots of hits in every fight (leveling up one/two handed).

Archery is a pain in the butt, I'd go with trainers for this one.

Alchemy is easy - collect lots of ingredients, grind out lots of random potions and sell them (also training speech).

Smithing and Enchantment are trained similarly. Make an iron dagger, enchant it and sell it. Repeat.

Active magic skills are a pain to train quickly - there's no exploits that I know of (but then, I'm not a big fan of the solo mage in any RPG, so I tend to avoid magic like plague in Elder Scrolls games).

Sneak, just walk around crouched all the time. It levels up with time. Pickpocket, you'll want to train at first, until you get a decent success rate, then just pickpocket everyone you see. Picklocks just don't get the generate-a-key perk and unlock every door in every town at night, wait until they relock, etc.

The Unofficial Elder Scrolls Pages should have more detailed exploit strategies - they seem to be the main user community for Skyrim.