Notebook

I hit on something to write here yesterday. But today I forgot what it was. I recognized my forgetfulness being worse these days and I came up with a banal but bright idea. Always carrying with me a small notebook and pencil in my pocket so that I could put down whatever I thought is important whenever I come across it. But the problem is I always forget to bring it when I go out. or if I successfully bring it, I forget to write down.
Writing this introduction.... What was I going to write?.... I forget.^^