AerBabe -
What on earth do you use the small bottle of AVGAS for? If I ever want a drop to help wipe the oil off something, that's what the fuel tester's for...
Having said that, small bottles of volative substances are no stranger to my own flight bag. Apart from the same things as everyone else, I carry: spare glasses, spare spare glasses (as my AME said, I _really_ need them when I'm flying!), and a little all-in-one glasses cleaner kit which includes a pump-action alcohol-based cleaning spray and a small non-scratchy cloth.
Last year's chart has now moved from my flight bag to the briefcase I take to work, where it features in the occasional coffee-break daydream. Though this is not always understood by the uninitiated. e.g. last evening at the dinner table: "Where are you going, dear?" asks the missus, seeing dinner table bedecked with half-mil. "Just working out how I'm going to get to Wroughton." "And do you think you'll have worked it out by October, when you're going?"