Do you ever see those people traveling completely unencumbered, one small purse and a book perhaps? That wouldn't be me, I adhere to the 'What if?' theory instead.
What if I pack a knitting project but I didn't read all the directions and I don't have the right number of stitch markers and? I pack another project, just in case
What if they take my knitting needles away in flight, it happened only once in Europe, but still? I pack some beading projects, just in case
What if there is a crying baby on board? I pack my ipod, just in case
What if my 3g network doesn't work? I pack my laptop, just in case
What if my checked luggage doesn't arrive? I pack my toiletries, just in case
What if they don't feed me and I have not time between planes? I pack some food, just in case
So if you see me in Dallas or PA, struggling under the weight of my luggage, you'll know I'm prepared, just in case!