I think about this question a lot. I know I have false memories, but I try to acknowledge I have them and treat everything as a sort of probability of having happened. Question everything, even your own memory. Find supporting evidence for your memories or assign them lower probability of being true. Recognize when important things are happening and try to also tie them to other concrete observables. This is a big one. Abuse and rape victims are often accused of lying because the get dates and locations wrong (so tie time to things that happened the same day). People assume because rape and abuse are so traumatic you would remember everything surrounding it with vivid clarity, but our emotions make just the opposite true. Try not to be overly emotional in your recall and recall over and over when unneeded, this may reinforce false memories. Take pictures often and review them often, it will make a framework of reality that real memories can anchor to.