A leopard cannot change its spots

A person's nature cannot change.

There are two sides to every question

There are always two ways of looking at something

Too many cooks spoil the broth

Too many people doing the same thing at the same time will not be successful

We never miss the water till the well runs dry

You only realize the importance of something when it is gone

To put the cart before the horse

To do something in an incorrect order

Don't count your chickens before they are hatched.

Do not make plans based on something that has not happened.

Don't make a mountain out of a molehill

Do not make a big fuss or issue over something minor or small

Experience is the best teacher

The best way to learn a job is to do it.

The last straw that broke the camel's back

The final thing that, when added to a bad or unpleasant situation, causes failure or ruin.

Empty vessels make the most noise

Those people who have a little knowledge usually talk the most and make the greatest fuss.

A burnt child dreads fire

A bad experience or a horrifying incident may scar one's attitude or thinking for a lifetime.

First come, first served

The first in line will be attended to first.

A friend in need is a friend indeed

A friend who helps when one is in trouble is a real friend.

Discretion is the better part of valor

If you say discretion is the better part of valor, you mean that avoiding a dangerous or unpleasant situation is sometimes the most sensible thing to do.

Actions speak louder than words

Children usually learn more from the examples set by their elders than from what they are told ; a person's character is judged by the thing she does and not by what he says; actions give evidence or proof of.

Between the devil and the deep sea

To choose between two equally bad alternatives in a serious dilemma.

Absence makes the heart grow fonder

One usually desires another more when he or she is far away.

Where there's a will there's a way

When a person really wants to do something, he will find a way of doing it.