Do Your Best is the Cub Scout motto.  It is one of the most important things for the Cub Scout to learn.  Often he becomes so interested in winning that he fails to see the importance of doing the best he can at everything.
     One boy's best might be quite different from another boy's best.  Help the boys see that no one can find fault with them if they always do their best in everything they tackle.  As a leader, you can see that the Cub Scout Promise, the Law of the Pack, and the Cub Scout motto are related to everything a Cub Scout does.  These are not just tests to be passed in order to qualify for induction.  Take advantage of every opportunity to mention how the Promise, Law, and motto fit an activity or service project in which the boys are involved.  Help them see this is a good way to live.

Cub Scout Motto

Do your best

Cub Scout Promise

I, (say your name), promise to DO MY BEST
To do my DUTY to GOD And my Country
To HELP other people, and 
To OBEY the LAW of the Pack

Law of the Pack

The Cub Scout follows Akela.
The Cub Scout helps the pack go.
The pack helps the Cub Scout grow.
The Cub Scout gives goodwill.
 

The Scout Motto

Be Prepared

The Scout Law

A Scout is trustworthy, loyal, helpful, friendly, courteous, kind, obedient, cheerful, thrifty, brave, clean and reverent.

The Scout Oath

On my honor I will do my best to do my duty
  to God and my country and to obey the Scout Law;
  to help other people at all times;
  to keep myself physically strong, mentally awake, and morally straight.
 

Tiger cub motto

Search, Discover, Share
 

Scout Slogan

Do a good turn daily.
 

Outdoor Code

As an American, I will do my best to--be clean in my outdoor manners,
 be careful with fire, be considerate in the outdoors, and be conservation-minded.