Always try to have these two on hand. I can make a lot of quick meals with these two:
-hong you (spicy red chili oil)
-concocted soy sauce (basically dark soy sauce with great aromatics like star anise, cassia bark, ginger, Sichuan peppercorns, and fennel seed).
Living risky and keeping at room temp: Big jar of very thick (cooked down to 115-118°C) inverted syrup, left reasonably sour. Useful for vinaigrettes, stir fry sauces, all kinds of baking, non dairy ice cream making...