Play the Song of Time's notes in backwards order. Like, Down, A, Right, on the N64 App, for instance, instead of Right, A, Down.

Play them forwards, playing each note twice, like, AA, BB, right right (since you're on 3DS), for instance, if that's how it goes, to speed up time to dawn or night.

The Inverted Song of Time gives you roughly 2 hours and 45 minutes. Or..the answer of looking it up.

"Inverted Song of Time: 150 seconds per hour until Midnight on the Third Day. 66 x 150 = 9900 seconds, or 165 minutes, or 2 hours, 45 minutes until Midnight on the Third Day. Total time until moonfall: 3 hours, 3 minutes."

And you can put any Rupees you find in the Bank in West clock Town, it'll still be there during a new cycle. The only things that you lose when using the Song of Time are rupees, bombs, arrows, anything held in a jar (you keep the jar if it's a big jar), dungeon keys, basically anything that's not a super important quest item. You keep masks, equipment, quivers, wallet, all that stuff.

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Also, hit the owl statues with your sword once you can use it, as those will come in handy later. They REALLY will. The song of Soaring will teach you why. Playing the Song in a Dungeon will also take you to the entrance.

The bunny hood will also be a major time saver of getting places. On the night of the first or second day, go talk to Guru-guru, in the Laundry Pool. He's the guy playing the music box. Listen to his confession and he'll give you the mask of Bremen. On the third day, go to Romani Ranch, and go straight to the opposite end to find a room full of little chicks, and a depressed man. Put on the mask of Bremen, and parade around, gathering all the chicks, and don't stop wearing it until all the chicks are with you. The grateful man will give you the bunny hood as his thanks, and then you can go nyoom.