go while the going is good—leave while the conditions are still favorable:
- I feel that it’s time that we went out as winners … go while the going is good, so to speak.
make good going—(UK coll.) advance rapidly; make good progress:
- You should be an experienced hiker, have suitable mountain equipment and be able to make good going.
Note: The expression does not correlate in meaning with the phrase be good to go—(coll.) be ready or prepared for smth.:
- I just need to put together a plan and then we are good to go.