Any day above ground is a good day. Before you complain about anything, be thankful for your life and the things that are still going well.
Live your life in such a way that you'll be remembered for your kindness, compassion, fairness, character, benevolence, and a force for good who had much respect for life, in general.
When you focus on being the best person you can be, you draw the best possible life, love, and opportunities to you.
Mento mori—remember death! These are important words. If we kept in mind that we will soon inevitably die, our lives would be completely different. If a person knows that he will die in a half hour, he certainly will not bother doing trivial, stupid, or, especially, bad things during this half hour. Perhaps you have half a century before you die—what makes this any different from a half hour?