Ho ho, this is not as exciting as it sounds!
I always tell people that I'm an "ideas person", i.e. think of things but don't want to do the work!
Anyway, my latest "invention" is a lovely sandwich filling! You know when a laydee wants a tuna sandwich (as my DH says its laydee's food), you have to mix it with something so it doesn't all fall out? I usually use mayo and/or ketchup. Well, last week on perusing my fridge I came up with a lovely alternative and mixed it with Hummous, delicious. I now have to think up a snappy name for it.
My other "discovery" is that the classic string shopping bags sold by Lakeland are MUCH better for hanging on the pram handles than the ones they sell for that purpose.
There, bet you didn't expect this to be such an exciting post. ANyone else got any good inventions or disvoveries of such an important nature?