Another piece of advice we got once was to dress up nicely while traveling, because airlines like to bump well dressed people up to first class so the lowly economy class will think they all paid for the privilege to not sit like a sardine. It worked once, we got bumped up to first class on a trip to Europe. It was wonderful, and when we arrived I said "Oh, we're here already?" It hasn't worked since, but I still try. I figure if it's between me and someone in sweats and a t-shirt that says I'm with stupid, that I would be the clear and logical choice.
The great thing about traveling to visit family is that when I (ooops!) forget something, I can just raid their closet and borrow it. Ooops, forgot a heavy winter coat! Ooops, forgot to pack a bulky warm robe! Ooops forgot to pack most everything! Hey, we're family, you don't mind if I borrow something, right? And that is why I'm traveling light today and trying to dress up in clothes that will still be comfy while in the sardine can of economy class. I won't wear the swimsuit on the plane though, because even I know a trip to New England in November will not involve beach hats and fruity drinks on the beach. Borrowed coats and robes and spending time with my Mom, that's the trip I want to have.