Don't wait. The time will never be just right.
Opportunities are like sunrises. If you wait too long, you miss them.
I'm a firm believer in that you've got to strike the iron when it's hot.
Timing is everything.
I beseech you not to blame me if I be desirous to strike while the iron is hot.
I'd better make hay while the sun shines.
The world does not wait for you.
You got to get it while you can.
Nothing is more expensive than a missed opportunity.
Between too early and too late, there is never more than a moment.
You gotta strike while the iron's hot.
Time and tide wait for no man.
Every opportunity passed is lost.