One thing I always make sure to have with me in my bag, is a travel size toothbrush. Yes, this is an absolute must for me! With long days and multiple meals, I can't stand the idea of waiting until going home to brush up (also you never know when you end up spending the night at a friend's place).
I usually just went for the regular ones you find in the drugstore in their travel section. However, when I came across this Slim Sonic Toothbrush at Ulta (also found in their travel section in the check out line), I thought it was perfect! It's a sonic toothbrush so it runs on a battery and vibrates, and it comes with an extra brush head (always great). What I loved most about it was the packaging. It has a built in case, making it very portable and hygienic.
I take this bad boy with me every where and it fits in almost every mag/clutch that I own.