Unfortunately I'm needing to call this one out on my spouse (still a work in progress getting her to grow facial hair! Let me tell you it is NOT easy)
She was making chicken salad for dinner and decided that she wanted to add grapes to it. When I pointed out to her that this would involve ~30 minutes (travel and the time to shop), plus cost around 1.5 gallons in fuel, for a VERY small purchase, I think she understood, but ended up going anyway. I only recently found this place, but it's already found me thinking in terms like that (is the trip worth it, what's the true cost, is it really needed?), now just need to bring her around to this way of thinking.
Yes, I am aware that a suburban is not mustachian, but as I said, new to MMM and I've got a LONG way to go myself (but at least I'm now on the road and heading the right direction!)