to start behaving more responsibly.
начать вести себя более ответственно. (nachat' vesti sebya bolee otvetstvenno.)
"You need to clean up your act if you want that promotion."
"Тебе нужно clean up your act, если ты хочешь получить повышение." (Tebe nuzhno clean up your act, esli ty khochesh' poluchit' povyshenie.)
a decision where people are divided in opinion
to reduce a list of options to a smaller number
a very close and trusted friend
to make something more interesting or lively
to flatter someone to gain favor
to be successful in life or career
