You've gotten some great advice! 3 yrs ago when I had a bout with excessive shedding, I started doing tea rinses and adding garlic powder to my conditioners EVERY week; sometimes twice a week. I have not had any excessive-shedding drama since.
Why not review the current Tea Rinse, coffee rinse, etc., 2013 challenge thread:
http://www.longhaircareforum.com/showthread.php?t=664751
Also, do a search for the 2012 challenge thread. There are GREAT suggestions, usage tips and testimonials in that thread!
But the key, for me, to curb excessive-shedding is consistent use of tea, coffee and garlic YEAR 'ROUND.
My time of the year for shedding excessively was early Fall. For the past 3 years, I haven't had that problem.