Well begun is half done.

好的开端是成功的一半

Time flies never to be recalled.

光阴一去不复返

When in Rome, do as Roman do.

入乡随俗

He laughs best who laughs last.

谁笑到最后谁笑得最美

Deal with a man as he deals with you.

以其人之道还治其人之身

Look before you leap.

三思而后行

Two heads are better than one.

三个臭皮匠顶一个诸葛亮。

A good beginning makes a good ending.

善始善终

A friend in need is a friend indeed.

患难中的朋友才是真正的朋友。

First come, first served.

先来先招待。

Where there is s will，there is a way.

有志者事竟成。

No pains，no gains.

不劳则无获

Time and tide wait for no man.

时不待人

Strike while the iron is hot.

趁热打铁

It's never too late to mend.

亡羊补牢

There is no smoke without fire.

无风不起浪