PTSD: I keep aware of my emotional state at all times. I have a log of what behavior and environments exacerbate my PTSD. I try to always have an outlet to vent anger and frustration (i.e. - exercise and video gaming). I have created a very strong support network. I know a lot of vets don't have a strong support network. It is really important to surround yourself with people you trust who can support you and validate your feelings.
Memory Loss: My memory loss is short-term. I have a dry-erase board on the fridge. I have a to-do list on my phone. I am constantly asking myself if there is anything I have to get done. It helps with memory retention.
Those are the basics of how I cope. If anyone else has anything they would like to add, I would love for you to share it here!