Tripwire - step up

Easy way to make a 1 block up from a way out tricky. Timing is everything, step on the closest edge of the tripwire, this triggers the block to move in front of you. When you're ready jump onto the block (and quickly the one after it) and you're up. (May take multiple tries to get correct timing).
Great for adventure/puzzle maps if you're not allowed to place blocks and looks impossible from a distance.

Check top photo for layout.

Materials:
8 Blocks
1 Piston
2 Tripwire hooks
1 String
2 Redstone