One skill I wish I had was the ability to write shorthand. I've even picked up a Gregg shorthand phrase book. I'm probably going to buy this Gregg shorthand textbook. The only problem that I have is that the words can overlap, like "seat" is written as "s-e-t" and the phonetics focus is a bit weird.
Right now, my writing is a bit slow, but if I can get used to using shorthand, I think I would probably be happier. Of course, no one will ever be able to read what I write, but that's not my problem.