Random Waves.

Do you ever sit down and not think? Even if you are in a crowd of people, sitting, standing, walking--just not talking. Does your mind ever go off into a chain of amazing thoughts? Doesn't it always seem as though there is never a place to write it down, or you will never remember it. That happens to me all the time, and I really don't know what to do about it. I will have an amazing epiphany, yet two seconds later I will forget it. Then, I will inevitably spend the rest of my time, where ever I am, thinking about what that amazing thought was. Is it bad if we loose our thoughts? And when we do, does that mean we aren't supposed to think for ourselves?