Never quit. It is the easiest cop-out in the world. Set a goal and don't quit until you attain it. When you do attain it, set another goal, and don't quit until you reach it. Never quit.
The old lessons (work, self-discipline, sacrifice, teamwork, fighting to achieve) aren't being taught by many people other than football coaches these days. The football coach has a captive audience and can teach these lessons because the communication lines between himself and his players are more wide open than between kids and parents. We better teach these lessons or else the country's future population will be made up of a majority of crooks, drug addicts, or people on relief.
In order to have a winner, the team must have a feeling of unity; every player must put the team first ahead of personal glory.
Set goals - high goals for you and your organization. When your organization has a goal to shoot for, you create teamwork, people working for a common good.