I have lived by a datebook since my mid-twenties. Before that time, I used to forget everything, especially appointments. When I started my photography business in 1986 (I was only 10), I HAD to use a datebook. Otherwise, I would never know where and when my weddings were. I also had a large wall calendar that I could see from the phone when brides called asking if I was available. We currently keep a monthly calendar on our fridge. I use a datebook planner on my computer. And I bought a lovely red datebook to keep with me while I am running around during the day. Can't miss those important dates.
Hey look! We are finally getting together with Kim and her family in March. Wheee! And I wrote it in pen, which means it MUST be important.