Most successful scheduling system to-date:
I divided each day up into four chunks:
- Morning (10-12),
- Early Afternoon (12-3),
- Late Afternoon (3-6), and
- Evening (6-9).
Then I put tasks into one of three categories:
- Medium, and
where there are
- several (~4-5) Small tasks to a Medium,
- two Mediums to a Large, and
- only one Large task fits in one of the ~3-hour time-slots.
Take a break after every significant thing.