In-room hotel coffee makers. Good coffee is a pleasure, but so is the penny-pinching brew that gurgles out of an in-room hotel coffee maker. Someday, hotels are going to figure out that these little machines are costing them money, and then it's good-bye in-room hotel coffee makers. Enjoy them while they last. (Pro-tip: when you check in, remember to ask for more whitening powder.)
Canned and frozen fruits and vegetables. Frozen snap peas are snappier than the ones in the produce aisle. Frozen blueberries are more flavorful for cooking than supermarket blueberries, which to be honest are hardly worth eating at all. I love corn on the cob, but canned corn tastes crunchy and sweet year-round, and there's no husking—you just dump it into a saucepan and turn on the heat (or substitute for fresh corn in this recipe to enjoy the taste of grilled corn in winter).
An expensive umbrella. Everybody puts up with crappy umbrellas! But nothing cheers you up on a rainy day like the impregnable foomp of a real Burberry umbrella. Sadly, I'm not allowed to have one, because on average I lose 0.18 umbrellas every time it rains. But I did have a Burberry umbrella back when I was a starving student in England, and in a rainy country, that umbrella was worth every skipped meal.
Bonus underrated thing:
Going the whole morning without talking or making eye contact. See: In-room hotel coffee makers.