Choosing a goal and sticking to it changes everything. Readjusting is a painful process, but most of us need it at one time or another. No knowledge is more crucial than knowledge about health education. Without it, no other life goal can be successfully achieved. Happiness is not having what you want, but wanting what you have.
Luck is what happens when preparation meets opportunity.
The best thing about the future is that it comes only one day at a time. Pick battles big enough to matter, small enough to win. First things first, second things never. Your future depends on many things, but mostly on you. What we think, we become.