I enjoy reading your hints. I have one of my own.
To save the inconvenience of losing your keys, simply use a safety pin to fix a spare set to the top of your pants each time you go out – becomes a habit.
Also, to remove light mildew from walls wash down with undiluted white vinegar. Don’t rinse off.
When cooking rhubarb, instead of adding heaps of sugar, use sweetener – you don’t need much.