Easy Archery skill
Go to Riverwood, find an elf named Faendal, and then deliver a note to Camilla. Next, find Faendal, and ask him to follow you. Make sure you have at least 200 gold. Ask him to train you. When he does, ask him to trade with you. Go into his inventory, and take your money back. You can do this five times a level, and it really helps early in the game. Repeat this as much as desired.