Memories

I always wonder how people write their own memoirs or biography. I seem to have a short term memory. I already forgot past distant travels. I'm not sure if this is common, or that I'm the only one with this shortcoming. Some people seems to be able to recall old memories vividly, just like it was yesterday.
I envy them. Maybe this is partly why I became a photographer, and writing this blog. To record fleeting moments.