Your letter is not about your ex being a d*ck. If he were a d*ck, you would have stopped thinking about him by now. But you are thinking about him. Almost a year later, and you're reaching out to me, too. You said you shouldn't be thinking about him though. Has someone told you that? Often our friends do.
Every minute you spend looking for something you misplaced, or trying to remember what you're supposed to do next, will harm your productivity. That, in turn, eats into your career potential. The good news is that there are many tools you can use to stay organized and productive, and so even the most disorganized among us can put a system in place to keep us in check.
I think I realized that I didn't have much power when I started school. I skipped kindergarten (much to my dismay) and went straight into 1st grade at a small town, mostly white, Christian, tight knit school where everyone's parents knew each other and everyone had just finished graduating together three months before.