The Elder Scrolls V: Skyrim PC Glitches

Armor Duplication

Using the armor stand in your house in Solitude, place any piece of apparel on the mannequin then immediately take it back before exiting the menu. Leave your house and then go back in, the armor should appear on the mannequin and will still be in your inventory.

Free Archery Skill

Visit Faendal at riverwood, he's a wood elf that usually stands by the mill.

1) Ask him to follow you.
2) Then ask him to train your archery. (Have some gold around at least to make your first purchase of training)
3) Ask to borrow something and take his gold. It's not considered stealing.
4) Repeat 2 and 3 infinity times.
NOTE: You can only level archery 5 times per level, but you level up slightly every time your archery skill goes up.

NOTE: This will work with any trainer who can also be a follower.

Restock any merchant instantly.

Follow the steps to instantly refresh the merchant's stock and gold: 1) Choose a merchant 2) Sell or buy anything 3) Save your game 4) Kill the merchant 5) Load the game