Having a well-stocked store cupboard really makes your life easier. I would advice for you to do a store cupboard Spring Clean.
Here is a list of things that I find I use again and again:
Spices
Ground cumin
Ground coriander
Curry powder
Crushed chilies
Bay leaves
Mustard seeds
Onion seeds
Cardamom
Ground cinnamon
Smoked paprika
Five spice
Cayenne
Nigella Seeds
Rosemary
Thyme
Nutmeg
Cloves
Sea salt
Black pepper
Turmeric
Other Essentials
Tahini paste
Bouillon powder (reduced salt)
Ritual Cacao
Cocoa powder
Oats (porridge)
Bicarbonate of soda
Baking powder
Vanilla essence/ extract
Dark chocolate
Tomato purée
Apple puree
Miso (brown and white)
Collagen powder
Maca powder
Marmite
Freezer Items
Peas
Sweet corn
Mashed potatoes (for convenience)
Chilies
Peeled bananas
Prawns
Berries
Frozen yoghurt and ice cream
Curry leaves
Kefir lime leaves
Pantry Essentials
Condiments, Oils, and Vinegars
Oils: Extra virgin olive oil (stronger taste, ideal for salads), virgin olive oil (good for sautéing), toasted sesame oil, chili oil, cold-pressed rapeseed oil, cold-pressed sunflower oil, coconut oil, avocado oil
Vinegars: Red wine vinegar, white wine vinegar, rice vinegar, balsamic vinegar and cider vinegar (with the mother)
Others: Mirin, soy sauce (dark and light), fish sauce, peanut butter, horseradish, Dijon mustard, English mustard, whole-grain mustard, capers, rice wine vinegar, gheetas mango chutney
Flours
White and wholemeal spelt flour
White Strong Bread Flour (preferably organic)
Wholemeal Strong Bread Flour (preferably organic)
Botanical blend XXX
Whole wheat flour
Cornflour
Gluten-free self-raising flour
Sweeteners
Honey (cheap and good quality - there is a difference)
Agave
Maple syrup
Unrefined caster sugar
Dark and light brown muscovado sugar
Coconut sugar
Dried Fruits
Dried apricots
Dried figs
Dried prunes
Goji berries
Dried dates
Raisins
Nuts and Seeds
Ground almonds
Hazelnuts
Cashews
Pumpkin seeds
Sesame seeds
Sunflower seeds
Pine nuts
Walnuts
Pecans
Chia seeds
Rice and Pasta
Dried wholemeal pasta
Egg noodles
Rice noodles
Brown basmati rice
Spelt
Spelt noodles
Quinoa
Pearl barley
Whole wheat couscous
Red Camargue rice
Wild rice
Short-grain brown rice
Jasmine white rice
Sushi rice
Millet
Polenta
Beans and Pulses
Tinned or jarred cannellini beans
Tinned or jarred kidney beans
Tinned sweet corn
Tinned fish (like sardines)
Tinned or jarred butterbeans
Tinned tomatoes
Coconut milk
Chickpeas
Puy lentils
Red lentils
READ THE LABELS
Sadly, we do live in a world where people get away with a lot of nonsense when it comes to selling food and regulations that are not as tight as they should be. When reading a label always look to the first 3 ingredients as they should be the 3 that there are most of. If you can understand them and they are not numbers, this is usually a good sign!