Lavender can be used for calming teas, for aromatherapy, in bath water, to make essential oil, to cook with, to make soaps; the possibilites are endless.
Last year when the parking lot plant sellers were getting rid of all their remaining plants, I stopped in and bought ALL of their lavender for about 25% of the original price. There are deals to be had, if you time your shopping just right. I gave some away to friends, and planted the rest. I can never have too much.
From www.crunchybetty.com, here are many different ideas for using lavender, one of the most useful plants out there.
Crunchy Gift Ideas: Love ALL the Lavender!