First what you want to do is get rid of the patch that stops the dupe glitch.
Go to the right system blade on the dashboard, click on memory, press Y the press X, X, LB, RB, X, X.
Then go to Oblivion and don't update.
Find a herb that increases/restores your intelligence. Dupe it about 200 times.
Then start eating it. After eating about 20 your level goes up.
Dupe the item again when your low on it.
This trick can take a while but it is really easy.

Note: Be careful when removing the game update, we will not be responsible!