"We need the courage to START and CONTINUE what we should do, and the courage to STOP what we shouldn't do"
                           Richard L. Evans 

The reason why people start something is because they have the courage starting is the easy part but getting the courage to STOP that's difficult part. Just tell yourself before you do something what would be the result to what ever i start because when your doing bad your going the down the stairs when you start trying to do good its harder so just like school grades get yourself to do good in the first place then do it later when your dug up.