Novelist and art theorist Andre Malraux one said:

"Often the difference between a successful person and a failure is not one's better abilities or ideas, but the courage that one has to bet on one's ideas, to take a calculated risk- and to act."

The more you can manage to step forward, take action, face your fears, the more courage you will be able to build up; and the more courage you gain, the more success you will attain. (that rhymes!)

When you build up your courage it will allow you to achieve what you want, regardless of what that means to you. You will be able to approach your boss to ask for that raise, walk up to that girl or guy at the bar, or you can even start spending your spare time on that side hustle you really want to get off the ground.

The real reason we procrastinate all of the 'things' in life that we want, is because of fear. Fear that others will laugh at you, criticize or judge you. Or even an internal fear that you tell yourself you are not good enough. 

Eleanor Roosevelt famously said:

"Courage is more exhilarating than fear and in the long run, it is easier. We do not have to become heroes overnight. Just a step at a time, meeting each thing that comes up, seeing it not as dreadful as it appeared, discovering we have the strength to stare it down."

Hannah Braime, a well-known life coach, wrote a great piece on 7 Effective Ways to Boost Your Courage, which I encourage you to check out and quickly skim.

Courage is not something you either have or don't. Courage is believing in yourself and in your capacity and worth. Courage is knowing that you will give it your best and step forward in spite of fear. That is when your courage shows and grows.