He who hesitates is lost.
Prov. People should act decisively. Jill: Should I apply for that job? At first I thought I definitely should, but now I don't know.... Jane: She who hesitates is lost. Call that girl and ask her out. Call her right now. He who hesitates is lost.
hesitate over something
to pause before acting on something; to suspend action about someone or something. We are hesitating over the final decision because we have some doubts about the competitors. Do not hesitate too long over this matter.
If there's anything you need, don't hesitate to ask.
a polite phrase offering help in finding something or by providing something. (Often said by a host or by someone helping someone settle into something. See also If you don't see what you want, please ask (for it).) Mary: This looks very nice. I'll be quite comfortable here. Jane: If there's anything you need, don't hesitate to ask. "If there is anything you need, don't hesitate to ask," said the room clerk.