Originally Posted By: bacpacjac
Napkins, little packages of condiments and individually wrapped drinking straws from fast food places.

Actually I often just put those extra packets into a ziploc bag and toss them in my backpack. Same with napkins because they can come in very handy for example blowing your nose when you've run out of tissues or in a pinch used as toilet paper if you are in a public restroom that is out.
kat