M - my MIL - My own mom died when I was 26, and MIL has always stepped up and treated me like one of her own. I'm so grateful we have a good relationship, especially when I hear stories of people who don't.
L - lights - my night-vision is crappy, and I'm really grateful for modern, easy lights (also, Christmas lights, which I haven't taken down yet, because we all need a little extra whimsy right now.

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K - kids - I'm grateful to have kids in my life. DS is grown, but I'm not a grandma yet, so I'm in my "honorary aunt" phase to various friends' kids. - I pick up one set (the 10-yr-olds) from school on Thursdays, and I do storytime for the 3-year-old's class on Wednesdays. They keep me young.