When I first started working, I found this to be one of the most important nursing skills I had to learn. What has worked well for me is this: I made a rule for myself that I'm allowed to cry and worry and be upset on the car ride home. But once I get out of the car, I have to put it aside. This has really helped me. Often times when you're on shift, you don't have time to really think about or process what's going on with your pts, but you need to do this. It's part of being human. But you also have to limit yourself because it can drive you crazy. I recommend choosing an allotted amount of time that you can spend after work reflecting, but then make sure you stop yourself from thinking about it the rest of the time.