“sätta sig på tvären”

Kasta inte sten i glashus

Don't criticise others for faults you have yourself.

tappa fattningen

to lose one's composure

lägga band på sig

to restrain oneself

Slå två flugor i en smäll

To achieve two things with one action.

gå bet på

to fail at, to come up empty

Lagom är bäst

Moderation is best – not too much, not too little.

i alla fall

anyway, at least

ha is i magen

to keep calm under pressure