Principle #9

List items in a parallel (the same grammatical) form.

Instead of:

Three good work habits are:

1. Setting priorities
2. You should finish what you start
3. It is important to do your best

Use:

Three good work habits are:

1. Setting priorities
2. Finishing what you start
3. Doing your best

Good workers:

1. Set priorities
2. Finish what they start
3. Do their best