1 Wipe the slate clean:
To agree to forget about past mistakes or arguments and start again with a relationship and start.
2 Turn over a new leaf:
To change your way of life to become a better, more responsible person.
3 Break new ground:
To make a new discovery or do something that has not been done before.
4 A (new) lease of life:
The chance to live or last longer, or with a better quality of life.
5 A clean break
A complete end to any connection with a person, an organization, a way of life, etc.
Créditos: Oxford University Press