Organizing time

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Across
  1. 3. The state of being productive
  2. 4. An excellent student
  3. 7. to earn something
  4. 8. to start ringing
Down
  1. 1. to spend time not doing anything useful
  2. 2. a device that measures time
  3. 5. A list of things to do
  4. 6. Reasonable and practical