I came to the conclusion, as I recall, in the car, while running errands, just the other day. I'm pretty sure we were on Geer Road, heading south, dealing with typical Turlock traffic, to wit, gaggles of overlarge SUVs being driven very badly by soccer moms on cell phones, handfuls of little cars with loud mufflers and stereos that shake the whole car and the pavement surrounding driven very badly by 20-something underemployed guys, and Buicks being driven very badly by old people. (Not that I condone stereotyping. In fact, that could be a potential motto: "Officially, I don't condone stereotyping. Unofficially, guys with cars like that are idiots." Eh. Not so much.)
I'm pretty sure we saw a very inane bumper sticker, and decided that this was the (very bad) driver's motto. It might have been the truck with the little cartoon Calvin figure from the long-defunct Calvin & Hobbes strip, peeing onto the words "gun control."
Anyway, choosing a motto, I figure, would be a simple, effective way of advancing my life prospects. It has to be snappy, relevant, and encouraging of the kind of behavior that would advance my life prospects. So "I like cheese," though true, is not a strong contender.
I'll consider contributions from all sources, and meanwhile continue my deliberations here.
So far, I have only one candidate: "You gotta eat." More, I hope, later.