Go for it now. The future is promised to no one.
Be gentle to all and stern with yourself.
To know oneself, one should assert oneself.
Be thine own palace, or the world's thy jail.
The most effective way to do it, is to do it.
You never know what motivates you.
Well done is better than well said.
The secret of getting ahead is getting started.
Never complain and never explain.
By failing to prepare, you are preparing to fail.
I have taught history on the high school and college levels, and am or have been a lecturer at the Smithsonian, The National Institutes of Health, and numerous colleges and universities, mostly on science fiction and technology subjects.