I use index cards and pen/pencil. i keep them around me car/home etc and I write ideas, to do list, whatever on them and as I finish/archive what I wrote on th

I use index cards and pen/pencil. i keep them around me car/home etc and I write ideas, to do list, whatever on them and as I finish/archive what I wrote on the card I toss it away. Please note I am an old person