“Stay focused.” If every person could just do that, they would be happier and more successful.

As for what to focus on, that’s your decision.

Henry Ford said, “Thinking is the hardest work there is, which is probably the reason why so few engage in it.”

You have one of three options with incomplete Rocks: 1. Carry the Rock forward to the next quarter. 2. If the Rock is 95 percent complete, completing the last 5 percent simply becomes an action item for the To-Do List. 3. Reassign the Rock to someone else.

List everything that must get done this quarter. Decide to keep, kill, or combine everything on the list, boiling them down to the right three to seven Rocks for the company and assign ownership.

Don’t get caught up in believing you can complete 100 percent of your Rocks every quarter. It’s perfectionist thinking and not realistic. You always want to strive for 80 percent completion or better—that’s enough to be truly great.

90 days is about as long as a human being can stay focused.

Do less, accomplish more.

establish the three to seven most important priorities for the company, the ones that must be done in the next 90 days.