Go for it now. The future is promised to no one.
Know or listen to those who know.
Be gentle to all and stern with yourself.
Wherever you are - be all there.
Either you run the day or the day runs you.
To know oneself, one should assert oneself.
Always desire to learn something useful.
Do not weep do not wax indignant. Understand.
Never complain and never explain.
To be a good loser is to learn how to win.
I believe you'll develop speed via strength work which includes hill running, either repeats, or running hilly courses as the Kenyans do on a steady basis.