The Legend of Zelda: Majora's Mask Glitches

Explore Termina Field Early
When you first get to Clocktown. Go to East Clocktown gate. Remember how you can't leave Clocktown as a Deku Scrub? Well forget that, cause now you can. Note the gap between the Guard and the right side of the gate, his right.
Center the camera so you can see the guards back. Hold Z, and walk backwards, keep holding down on the control stick and if you have the camera at the right angle, it should bring you outside. You'll be in Termina field with no monsters and no music. You have free reign to collect as many rupees as you want. A good time to save up for that 5000 Rupees you need for the Bank Heart Piece.