do one's best

Verb

Meaning

perform a task as well as possible

Source: WordNet

attempt strive endeavour go for broke bend over backwards pull out all the stops have a go bang away go all out give full measure give one's best

round off

perform do

Yesterday was a memory. Tomorrow was a hope. Today was another day to live and do one's best to love. Karen Marie Moning

The cast gives full measure every night Source: Internet

do on the fly do on the sly do one do one's bird do one's bit do one's bit for