I've been prepping an entire head of curly kale each weekend for salads
1. Trim bottoms
2. Soak in ice water until stiff and refreshed
3. Trim off all stems and rip into bite-size pieces
4. Dress with lemon/oil blend
5. Crush until limp, tender & dark.
This reduces it by 50% at least.
I also make a big batch of tabouli (cracked wheat prepared with homemade chicken broth, boatload of parsley, diced English cucumber (deseeded), diced/spun tomatoes, dried mint, dried z'atar, lemon/oil dressing) and then each day pack up a container lunch of kale, fresh lettuce, tabouli, topped with fresh tomatoes and hearts of palm.
Larry enjoys it so much we have it with dinner each night too.
Takes a bit of time on the weekend to prepare both, but the ease during the rest of the week makes up for it. Not to mention the burst of flavor.