The exact process you use to build courage isn't important. What's important is that you consciously do it. Just as your muscles will atrophy if you don't regularly stress them, your courage will atrophy if you don't consistently challenge yourself to face down your fears. In the absence of this kind of conscious conditioning, you'll automatically become weak in both body and mind. If you aren't regularly exercising your courage, then you are strengthening your fear by default; there is no middle ground.

To abandon a comfortable lifestyle that isn't deeply fulfilling is to abandon nothing.

When in doubt, act boldly, as if it were impossible to fail. In essence it is.

The only thing stopping you is fear, and the only thing that will get you past it is courage. What you do with your life isn't up to your parents, your boss, or your spouse. It's up to you and you alone.

Embrace opportunities with limited downside, unlimited upside. The best deals are those where your risk of loss is predictable and fixed if things go wrong, while your potential gains are enormous if things go right. Take such deals whenever you can get them if the odds of success are halfway decent.

Believing that you must do something perfectly is a recipe for stress, and you'll associate that stress with the task and thus condition yourself to avoid it

Saying no isn't easy, but it's a required skill if you wish to have any degree of focus in your life. If you say yes too often, you'll likely fall into the common trap of saying yes to the good while simultaneously saying no to the best.