If you board your horse at a full care facility, or even self care where your horse is still handled and turned out by hired help,take a moment to talk with them about your horses behavoir. Many wont have to ask,I myself let boarders know how their horses are for me (in the nicest way possible if its not flattering lol).
I know how my horse behaves for me,and I know it isnt the same as he behaves for others (watching my fiance try to show him in halter was a GREAT example ) and its always nice to have the extra insight.
Its also shows us handelers that you CARE if your horse gives us a hard time and we certainly appreciate when you actualy work on those issues. Your horse will be all around better for it and a good handler will always reinforce the the basic principles that you set for your horse