The dog that trots about finds a bone.
Be gentle to all and stern with yourself.
Begin to be now what you will be hereafter.
Know or listen to those who know.
Be thine own palace, or the world's thy jail.
The secret of getting ahead is getting started.
Always desire to learn something useful.
The wise does at once what the fool does at last.
Wherever you are - be all there.
Leap, and the net will appear.
I'm someone who's done the opposite of whatever the received wisdom is, to keep your career going into your 50s.