It's always too early to quit.

Know or listen to those who know.

The most effective way to do it, is to do it.

Go for it now. The future is promised to no one.

Be gentle to all and stern with yourself.

The secret of getting ahead is getting started.

The wise does at once what the fool does at last.

Well done is better than well said.

By failing to prepare, you are preparing to fail.