My daughter did something "bad"/something not as nice at school, and she later felt guilty about it. She didn't know how to forgive herself so we brainstormed a sentence (mantra) she could say to give her some extra love and move forward. 

Thoughts about being so kind to yourself & how to use the Redeemer's atonement instead of stewing in anger towards your past mistakes. 

How to use the tool "Next time I will..." so you can move forward instead of sticking in the mud of shame or guilt. 

"Please don’t give precious space in your soul to [old grievances where you caused pain to another] any longer" --Elder Jefferey Holland

“When the Lord requires that we forgive all men, that includes forgiving ourselves." --Elder Dieter Uchtdorf