Oh yes, I've "been there, done that"!. :)
The take & bake pizza at the grocery, when there are ingredients at home (pizza dough, cheese, sauce) to make it.
One time, on a 10 car drive, about 3 hours into, we realized that we forgot to pack the diapers (all of 'em, and the wipes & diaper rash ointment). That set us back when we stopped at the gas station.... pricey, but necessary.
I will sometimes try new items, even items that more expensive, just to try them sometimes. Occasionally, it's worth it. Example: DH has a guilty pleasure of potato chips; I'll be the veggie or sweet potato or rice versions, which are definitely pricier, but at least slightly healthier for him (and since it's an occasional thing, it's okay). I'm a sucker for handcrafted bar soap, and good handlotion, after using the cheaper stuff, the good stuff is just so much better.