Mantra for Forgiveness
Here is a shloka you can say last thing at night.
This is the meaning :
Whatever I have done with my hands or feet, or speech, my body or my actions,
Whatever I have heard or seen, or thought, all my mistakes,
Whether knowingly or unknowingly, please forgive them all,
Great all forgiving God, Mahadeva Shambhu.
The shloka :
Kara charana krutam vaak kaayajam karmajam vaa
shravan naya najam vaa maanasam vaaparaadham
vihita maavihitam vaa sarvametat shamasva
jai jai karunabdhe shri maha deva shambho.