Expect problems and eat them for breakfast.
If you think you can do it, you can.
Know or listen to those who know.
It's always too early to quit.
If you're going through hell, keep going.
Never complain and never explain.
Be kind whenever possible. It is always possible.
Be gentle to all and stern with yourself.
Quality is not an act, it is a habit.
Go for it now. The future is promised to no one.
I used to joke that if acting didn't work out, poetry was my commonsense fallback.