err on the side of

bright side

A consoling aspect of a difficult situation.

err on the side of caution

To act in the least risky manner in a situation in which one is uncertain about the consequences.

get out of bed on the wrong side

To start the day in a bad mood for no apparent reason.

get up on the wrong side of the bed

To feel irritable; to be in a bad mood; to have a bad day from the start, for no particular reason.

have time on one's side

To not be rushed; to have plenty of time to do something.

know which side one's bread is buttered on

To be aware of where one's interests lie in a situation.

look on the bright side

To examine a situation, usually unfavorable, from a positive perspective; to be cheerful or optimistic.

look on the bright side of it

To examine an aspect or facet of something in a positive view.