On the East Road just out of Hobbiton (past the woodsman who trades his dagger for pipeweed), on the ledge above the stumps that summon the elves is a house. Enter it and walk up to the bookcase. Press Action and a gold coin will appear. Leave the house and re-enter. Another gold coin will be there. Repeat this to get as many coins as needed.
To pass the 21st hall in Moria, go to the center of the room and push or pull the four blocks of stone with hands on top of the tiles that you can step on. Once you put all four on, you will pass that part of Moria.
Amon Hen: Defeating the Ring Wraith
When you fight the Ring Wraith on the Balrog, there is a tower with steps that you can walk up. If you stay up there, the Balrog cannot hurt you, except when it takes flight.
When you get to the point where you are looking for Merry, Pippin, and Sam in the cave, you will see a box. Go to it and you will get the dagger.
Wake up Lobelia
When you have to escape from the Dark Riders in Bywater, throw a rock at the bell bell five times. You will see her lights turn on.
At the start of the game if you talk to Ted Sandyman, he will say that he is looking for a silver pin. The pin is hidden in the weathervane over by the river. You will see another Hobbit there. Talk to him. He will ask you to throw a rock at the weathervane to get it to move again. When hit, he will give you the silver pin.