For the move slowly as possible exercise I washed dishes as slowly as possible.
This is the spend an hour writing you name exercise.
For the walk in a circle as fast as you can for an hour I walked around a pond in a big circle several times.
I chose to walk the majority of the time on the side walls of the pond.
This is a shot of myself doing the stare at yourself in a mirror for an hour motionless exercise.
Out of all the exercises I would have to say the walking in a circle was my favorite. It made me think about my stamina in other circumstances. It also made me think about what is defined as a circle because the pond is not a perfect circle. Also because I chose to walk the majority of the way on the pond walls I was thinking about my balance abilities.