CONDIMENTS
The condiments you want to store in your kitchen are:
Salts
Oils
Vinegars
Mustards
Sauces and Pastes
Preserves.
What these give you are concentrated shots of flavour- sometimes delicate (cider vinegar over a pear salad) - and a range of condiments that suit your Go-To and Magical Foods - which you can use as an add-on (mayo) or a partner (a walnut-based dressing over beets and feta cheese).
Salts and oils and vinegars can be added both after and/or during cooking
Mustards, sauces and pastes are typically added after cooking - mayo, ketchup, pesto, wasabi
Other sauces and pastes are typically added during cooking - soy sauce, pomegranate molasses, tahini - with an extra shake over the dish at the end for emphasis