I just finished the last temple in Skyward Sword, Sky Keep. In one of the rooms (the one inspired by Eldin) there are three switches you have to hit in order for the locked gate to open.
I couldn't figure out what the required order of hitting the switches were, so I had to brute force my way to the solution: 2-1-3 (if I'm not mistaken).
How was I supposed to know this without guessing? Were there any clues that I didn't catch?