I have to think of a clock to remember which order CSS properties go in.

The day starts at midnight, when the minute hand points up, or towards the top of the object. As the day progresses, the hand moves clockwise around, and points towards the right, then the bottom, then the left.

I spent quite a long time flipping through my CSS book when I needed to do something until I thought of that - I don't really work with CSS often enough that I could just memorize the order and know it without some help.