run something up the flagpole

a little of something goes a long way

Only a small amount of something is usually required to produce a great effect.

break into a run

To start running.

chalk something up to experience

To take a lesson from a bad outcome instead of grieving it.

common run

Ordinary persons, things, or events.

dry run

A practice or rehearsal; especially, one that goes through all the motions of a physical process but without the raw material or workpiece present.

dummy run

A trial or practice before the real attempt.

get something over with

To proceed to do something as soon as possible, especially so as to have something unpleasant behind oneself.

give someone something to think about

To threaten or provide a challenge to.