Press yourself up against the grate and use the ladder to longshot clip past the block. This clip can only be done with the longshot as the hookshot's range is not far enough to reach the ladder.
Get in the "corner" of the gate and the wall next to it and place a bomb behind you. Slowly walk up against the wall and get pushed through by the explosion.
Do a forward thrust towards the wall, where the wall and the gate meet. Inconsistent, make take some tries.
The gap can be crossed with various methods. These include hoverflip, hoversidehop, hoverboost, hammerboost, Hover HESS. These methods are found in the video below.
By hookshot clipping the ReDead past the spike walls, you can skip Din's Fire. This can be difficult because the damage from the spikes will stop you from using the hookshot. The trick for this is to L-target and be moving either left or right against the wall, while aiming slightly down.
It is possible to skip pushing the block in the room with the falling spikes by backflipping on top of the traps as they fall.
By using precise boomerang throws. It is possible to get this Gold Skulltula as child.
It is possible to skip the boss key in Shadow Temple with a well timed ledge clip + bomb boost from a bombchu.