What should I care and not care about?

 Things that you should NOT worry about.

• Your past. What’s gone is gone, you don’t have the ability to go back in time and change things. Thinking about, worrying about your past is a waste of time, and I’m sure your time is limited.
• Your future. Every time we use the present to stress about the future, we’re choosing to sacrifice joy today to mourn joy we might not have tomorrow. Stop worrying about the future because you cannot predict the future nor you can control it. Factors like luck, randomness and chance contribute a lot.

Things that you should care about.

• Your present. Use your present to make sure you don’t make it a regretful past instead of regretting of the past itself. Use your present to make a beautiful future instead of worrying about it. What you have is the present, the now, planning for tomorrow or mourning over the yesterday is not going to take you anywhere. Live the moment.

“Yesterday is gone. Tomorrow has not yet come. We have only today. Let us begin.”
― Mother Teresa