Verb
do one (third-person singular simple present does one, present participle doing one, simple past did one, past participle done one)
(UK, colloquial) To go away, to leave; to get lost.
It is easier to do many things than to do one thing continuously for a long time. Quintilian
Individuals, too, who cultivate a variety of skills seem brighter, more energetic and more adaptable than those who know how to do one thing only. Robert Shea
When I'm on stage, I'm trying to do one thing: bring people joy. Just like church does. People don't go to church to find trouble, they go there to lose it. James Brown
Think of many things - do one. Portuguese Proverb
Do one thing at time, with supreme excellence. Nasa Proverb
The horse may wish to do one thing, but he who saddles him another. Spanish Proverb