Well begun is half done.
Time flies never to be recalled.
When in Rome, do as Roman do.
He laughs best who laughs last.
Deal with a man as he deals with you.
Look before you leap.
Two heads are better than one.
A good beginning makes a good ending.
A friend in need is a friend indeed.
First come, first served.
Where there is s will，there is a way.
No pains，no gains.
Time and tide wait for no man.
Strike while the iron is hot.
It's never too late to mend.
There is no smoke without fire.