I know they take up a lot of room in the fridge, so here are two super simple ways to free up some space:
first wash it (by swishing it around in a big bowl of water then letting it drain) and chop it up into bite sized strips or whatever. sprinkle salt all over it (I used a smallish cabbage and probably a half teaspoon of salt) and let it sit in a bowl for a few minutes, or in the fridge a couple hours.
make a dressing with a teaspoon of honey, 1/4 tsp or so orange zest, a glug olive oil and splash rice wine or apple cider vinegar, salt and pepper.
add whatever you like to the salted cabbage: shaved radishes or carrots or turnips or roasted nuts or scallions.
mix it up. top with some parmesan if you want. parsley or chervil is good too. lasts a couple days in the fridge.
Wash and chop. Toss with olive oil, salt and pepper. Or, if you happen to have a pan of bacon fat and a crumbled red chili, toss it with that. Spread it out on a pan and put it in a 375 degree oven for at least 20 minutes, til it gets soft with a few crispy bits.