Lord Shiva Maha Mrityunjaya Mantra
Having explained the first two pada of the mantra, Sukracharya continued to explain the remaining two pada. He said " the next two pada (consisting of sixteen syllables) is meaning - Prabhu! just as the ripe cucumber is severed from the bondage of the creeper, in the same manner may we be delivered from death for the sake of immortality (moksha). Rudra deva is like amrita (nectar of immortality). Those who worship Him with good karma, penance and repentance, meditation, contemplation, prayer or praise, will surely renewed life and vigor. The strength of truth force (in this mantra) is such that Lord Shiva shall definitely free the worshipper from the bondage of death because Shiva alone is the giver of bondage and moksha.
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