Do your best; take it as it comes.
You can handle anything if you think you can.
Just keep your cool and your sense of humor.
~Smiley Blanton, M.D. (1882-1966) American Psychiatrist
One of my father's sayings was: "You can and you will".
This taught me that to make changes and obtain ones' goals: Attitude is Everything!
The best teaching tool of this concept can be found by reading, (again), Oh, The Places You Will Go, by Dr. Seuss.