Go through the first level. Make sure you defeat all the enemies you should be lvl 2 or 3. Press select, then choose save. After saving select quit. The go to load game and choose your save. Repeat as much as you want. You can do on any level. Makes you very high level.
Well, The only thing I'm here to tell you is...Legolas Rules!
Okay...My suggestion/hint is that you should pick Legolas if you just began the game. He is very accurate, altough weak in strength. The good thing about this is that he can seek and kill enemies from a far range.
Unlike Gandalf (He does have spells), Aragorn and the others. This is useful when you are fighting strong foes like the Big Demolition guys who blow up. Then the Dogs or Snowbourne Trail, The monkey dudes, and last of all...the hardest Elephant guys.
Legolas shoots from a far range, which prevents him from getting killed close up.