Anything that makes life more difficult than it needs to be. I am 48. I have worked hard all my adult life, managing parenthood at the same time. By the time DD is old enough to look after herself, my parents will be elderly and I'll need to look after them.
I can do without any more demands on my time and energy!
So, grooming now consists of soap and water, a hairbrush and deodorant. Makeup: On special occasions I might stretch to tinted moisturiser, a dab of shimmery crème eyeshadow and tinted lipsalve.
Any shoes other than trainers and footbed sandals can get to f*ck.
If clothes are not comfortable enough to sleep in they are not comfortable enough full stop. Anything tight, itchy or non-breathable is out.
If knickers are smaller than the footprint of an average Volvo they are out.
Jewellery - no objection in principle but generally can't be arsed. Again, if I can't sleep in it, it's not getting worn.
And sex. Seriously - who has the energy? Fortunately DH feels much the same. In general we'd both prefer a mug of cocoa and an early night!