How do I navigate the lost woods?

There are two ways of navigating. The first is to listen for the music cues. The second is to go down the tunnels to almost the transition point. The real tunnel has a slightly different appearance when you do this.

I use the second method when I play, as I found it faster and more reliable. As I recall, the trick also works in Majora's Mask.

It's been quite a while, but if I remember correctly, the music is the trick. I belive it gets louder as you get closer to the "right tunnel."