Make an habit to put things on the same places all the time. So you will always know where to find them.
Make photos of things you don't want to forget with your mobile phone or another device that you always have with yourself. You can make a picture of your child's school timetable or of the closed door after leaving home, or where you put your purse, etc. It's easier to remember things if you combine them with some actions and even if you forget them you can always find pictures on your device.
Any information needs some time of your focused attention to be remembered. So just don't hurry and be concentrated on things and actions that you need to remember. It works for everything: for names and faces of people, for new words, for where you put your keys when you come home, for remembering that you turned off the gas before leaving, etc.
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