I never got what all the fuss is about. All I do is wait for a Southerly Buster to spring up, hold out a loose bit of string or ribbon, and point the pointy bit the way the string indicates. Works every time.
Only problem is that Southerly Busters don't come by every day, hence my pitiful number of imaging hours this year. Sou' westers don't work to well I've found - it really HAS to be a southerly breeze. The stronger the wind, the more pronounced the drift.