The Clock method? A rough rule of thumb that will annoy the pedants but:
Think of the degrees off the nose as portions of the hour,
so >= 60 degrees - 60 minutes - the whole hour - i.e. it's all crosswind
45 degrees - three quarters hours - three quarters is crosswind component.
30 degrees - 30 minutes - half hour - half is crosswind, etc, etc
Well, it's either that or remember your sine tables......
