You need a LOT of odds and sods to make my salads. Normally I open the fridge and I chop lettuce or use a bag of green and put it in a bowl. I finely dice, thinly slide or grate some of the following into the bowl (depending on what is in the fridge).
Apple, cucumber, raw onion, cabbage, carrot, mange touts, avocado, celery, fresh peas, pickled onion, olives, peppers, raw mushrooms etc...
I sometimes roast sweet potato, butternut squash or grill thin courgette strips to have something warm in the salad.
Sometimes I add puy lentils, seeds (pumpkin, sunflower, sesame, poppy), nuts (walnut), dried fruit (apricot, raisin, sultana), fresh fruit (watermelon, pomegranate seeds).
Then I add a protein; ham, boiled egg, tuna, salmon, mackerel, feta, etc..
Finally I have a few preferences for dressing; Greek yoghurt/Mayo 50:50, Mayo/Yoghurt with lime juice, Vinaigrette, Vinaigrette and Mayo mix.