This is a long and rambling reply. I apologise in advance.
If I have things I need to remember on a regular basis, I use a counting system. For example:
- I know that for a computer to be operational (I am in the IT industry), it needs at least five cables plugged into it.
- When I go to work, I leave with my laptop, my carry bag and my lunchbox. So when I come home, if I'm carrying three things, I assume I have everything.
This is not always effective, because I might have (for instance) my car key in my hand when I walk out of the office, so I will leave my lunch box or carry bag behind.
Post it notes don't work, because I never look at them to read them. They don't feature in my "stuff to look at" world.
If I have something important that I think of, I need to write it on a piece of paper (A4) and put it in front of my door so that I will walk over it (I always look down when I walk because of over-stimulation).
Like others I use my cellphone for reminders. This is very useful with a calendar, but sometimes I might be busy and press the "ignore" button and then forget that the reminder came up (also, I can forget as soon as I've finished a phonecall that it ever took place*).
schleppenheimer, I have tried, almost every year since the age of six, to write in a book to remember stuff, but I usually end up forgetting the book behind, or forgetting to open it. So you'll find long lists of things to do, and I never do them. I am the incarnation of "out of sight, out of mind". It makes life interesting, and not in a good way.
Now that I'm married, I get my better half to remember stuff for me.
I have been so forgetful that I will be hungry and order food over the phone, and then forget I've made the call. Then a couple of minutes later I'll feel hungry again and eat my packed lunch, and then the food I've ordered will arrive.
So if you do come up with a good memory tool, please let me know.
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* When I was at boarding school in Grade Eight, I happened to be passing the hostel telephone one day, and a call came in from the head prefect's mother that he must phone her urgently. I forgot the call ever took place as soon as I replaced the handset, and later in the hostel meeting, the prefect asked us who took the call, because it was to tell him that his father had died. I was just as shocked as everyone else that someone could forget such an important message, and then an hour later in bed I remembered taking the call. That is still one of the worst things that has happened as a result of my forgetfulness.
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If you break a crumb in half, you have two crumbs - George Carlin