I've gotten to the point where I pretty much already have all the different herbs I would use in cooking, and yet herb collecting is somewhat addictive and I have this compulsive feeling that I don't have enough ;)
So I'll have to remember to source out other plants beneficial for health and well being, so I can have a crack at making my own teas and things. I love tea, and I'm all for (inexpensive) natural remedies!
This is my inspiration, hands down one of the most valuable books in my collection (In fact I even own 2 copies):
