We all forget things often and risk losing good ideas. As soon as a brilliant idea comes to you, there are two things you can do to preserve it. First, you can record it – in writing, picture, drawing or video – and put it in a place where you will never lose it. The alternative, I’m afraid, is to let the idea linger in mental space and see if it can stand the test of time. The best ideas are not easily forgotten and won’t leave you alone. If you truly want to test the relative strength your idea, see whether you forget it after a while. If you fail to write it down and never forget it, chances are pretty good that your idea counts for something and isn’t going to run away from you.