Early in the game you meet a NPC that leads you down to the swamp. Follow him and head north until you are at the "Don's Temple" (you'll know where you are because a guard stops you from going in).

Head east past crates and barrels and follow the path up the hill. Turn right heading up the hill and you'll come across a house in the middle of a pond.

Talk to a man named "Rhobart", he will end up giving you a quest to find "10 Brugleweed" so he can make beer. There is a heap around the pond and the swamp.

Once done talk to Rhobart and give him the 10 Brugleweed. He will give you 70 gold, 50XP every time you do this.

After that's done it's a good idea to save you game after each encounter as it's a pain to have to redo these tasks.

Now for the cheat! Attack Rhobart until he falls to the ground, then put your weapon away and then pickpocket. You'll get all of your Brugleweed back so when he wakes up again you can repeat...

PS: Be careful, when you knock Rhobart down, that you don't keep attacking as it will perform a finishing move making this cheat useless. That's why I recommend saving frequently.

PPS: The more Brugleweed you find the quicker you'll get rich and level up.