different things...depending on how my day at work went, I think about the patients I've cared for, and if there was anything different I could have done for them; my family, and how much I love them, and hope they're proud of the work I'm doing.; the different things I planned for my life, and how none of those plans really turned out the way I wanted, but ended up being what I needed; if I have made any worthwhile contributions to this world, and if I have had a positive impact on the lives of people I come into contact with, however briefly.