This post on Of Dollars and Data is a bit rambling, at least from my perspective, but I did like this paragraph:
Think about the story you tell yourself about yourself. In all the lives you could be living, in all of the worlds you could simulate, how much did luck play a role in this one? Have you gotten more than your fair share? Have you had to deal with more struggles than most? I ask you this question because accepting luck as a primary determinant in your life is one of the most freeing ways to view the world. Why? Because when you realize the magnitude of happenstance and serendipity in your life, you can stop judging yourself on your outcomes and start focusing on your efforts. It’s the only thing you can control.
I think this chimes well with Stoic philosophy: focus on the things within you control. There are going to be times in all of our lives when bad things happen. Conversely, there are going to be times when good things happen. We can’t control anything apart from our reactions to these things.
Source: Of Dollars and Data