I keep bottles of concentrated stock rather than cubes or powders, I find it more versatile. In the same vein I usually have curry pastes rather than powders.

Fino and cream sherry, bottled lemon and lime juice, light and dark soy, oregano, cumin, strong maple syrup or honey, cocoa, peanut butter, marmite, sweet chilli sauce.

Tabasco, Henderson's or Lea and Perrins, tube tomato paste, some dried fruit, nuts, dill pickles.

In the Life's Little Luxuries section - truffle oil or puree, rose syrup, pomegranate molasses, flavoured crystal salt, smoked garlic, wild rice, asafoetida.