Learning some calligraphy (just simple italics) has really come in handy over the years. I got a book and practiced a bit and then started using sets of colored felt-tipped calligraphic markers - they last a long time if you take care of them.
I didn't know how useful it would be to be able to make handprinted signs, labels, and so on. You can also write out decorative mottos and longer inspirational quotations to set around the house to inspire you and your family. (And your overall penmanship improves, too!)
By pamphyilafrom L.A., CA