Be gentle to all and stern with yourself.
Be kind whenever possible. It is always possible.
Well done is better than well said.
Expect problems and eat them for breakfast.
What you do today can improve all your tomorrows.
Be thine own palace, or the world's thy jail.
If you think you can do it, you can.
To be a good loser is to learn how to win.
The dog that trots about finds a bone.
The most effective way to do it, is to do it.
In hard-core science fiction in which characters are responding to a change in environment, caused by nature or the universe or technology, what readers want to see is how people cope, and so the character are present to cope, or fail to cope.