Hmm, i tend not to remember things, or not remember of of what happens. My simple solution to this ( started about 3 years ago ): I carry a digital camera with me at all times.
Sometimes i take pics, and sometimes i shoot video, but the point is the memory is still there.
I ended up showing a friend of mine a video of us a few years back, and he burst out in shock because he never remembered the day that was on the film.
i wont say i don't trust my memory, but i do keep a good backup of data of it on video.
i once read a quote that went something like : a person who KNOWS something is very dangerous. i'm sure i screwed it up, and i can't remember who said it. what is really scary is how many people are convicted based soley on eyewtness testimony.
truth is when a bunch of experts groups together to discuss a specific subject using scientific procedure. And if they all agree at the end product, that's the time they will believe that something is real.
In my case, the only thing that i can trust are things that are backed-up by proofs.
I say do a leap of faith. True, out memories are faulty, but if we allow ourselves to be bothered by something so insignificant as its reliability then we can never move forward. Kind of like how modern psychologists and scientists don't believe we have free will.
Here's the thing about paranoia: Those people who you hear about, who live in their basements wearing tinfoil holding shotguns convinced aliens are after them?
They're alive.
Besides, even if you can't trust your own memory to be 100% accurate, at the very least it functions as a rough guideline.
Your right about our memories. Everytime we remember something it is changed. Our most precious memories are the first be to warped beyond recognition.