How to remember the order of the key signature – flats

The order of the key signatures for flats:
B E A D G C F

The best way to remember this is to realise that it is:

THE OPPOSITE 
OF
Fat Cats Go Down Alleys Eating Bacon

That is the key signature order of flats is the opposite of the key signature order of sharps. If you write this in reverse order you get:

Bacon Eating Alleys Down Go Cats Fat