slip back to old ways

set one's watch back

To ponder or experience a past time.

cast one's mind back

To try to remember a particular time or event; to think about somethin…

way back when

At a time in the distant past.

the chickens come home to roost

A person's past wrongdoings will return to negatively affect them.

go back in time

To talk about history or the past.

back in the day

In the distant past; especially, at a time fondly remembered (the good…