[Labraiki]

On your mark, get, set, go - na miejsca, gotowi, start

Set the wheels in motion - uruchomic machine ( w sensie metaforycznym); rozpoczac ciag zdarzen, dzialan, ktore maja pomoc komus w osiagnieciu celu

[zuzaa]

set the agenda
to decide what subjects other people should discuss and deal with, often in a way which shows that you have more authority than them Opposition parties have managed to set the agenda during this election by emphasizing the public's fear of crime.

[Dominika93]

to be well set up- być dobrze ustawionym

[aleksiskin]

Set-up jako rzeczownik: pułapka, zasadzka

He didn't die. It was a set-up.

[niqsov]

To be set to work - to start working with a lot of enthusiasm

Set the stage for something - to create certain condition for something to happen

[kosovitz]

one's heart is (dead) set against something - one is totally against something
think the sun rises and sets on someone - think someone is the most important person in the world.

[Adam Kowalczyk]

set sail for some place - to leave in a ship or boat for some place.

set one's heart against something - to turn against something; to become totally against something.

set great store by someone or something - to have positive expectations for someone or something; to have high hopes for someone or something

[ingestre]

set the fur flying - to cause a bad argument

[Crocheter]

set in stone - firmly established and very difficult to change
set the world on fire - to do exciting things that bring fame and glory
set the stage for sth - to prepare sth for some activity

[Amaya]

set mind at ease/rest - to cause someone to stop worrying
set teeth on edge - [for a scraping sound] to irritate someone's nerves
set right - to correct something