Well, strangely enough a few drinks seems to help my condition.
Perhaps it's just that the symptoms are less apparent when I am more relaxed, also, as mentioned earlier dehydration seems to help.
I do believe that exercise helps, bizzarely, when I run I do not feel off balance, only when I walk.
Not sure I believe in Vestibular rehab any more, there may be surgical cures but I think the biggest cure is time.