This thread's huge and I haven't had time to read it all, so apologies if I'm repeating something already posted.
Daily vitamin D3. I now have horrible side effects if I don't take this year round, whatever the weather. The joint pain is unbelievable for something with so simple a cause as a vitamin deficiency.
Daily green juice, made predominantly with vegetables and a bit of apple or kiwi, make you feel really good. I use a nutri-bullet.
Kegel-8 machine for pelvic floor exercise. It's far more effective (or I'm too lazy) to do it manually. I have a stage 1 prolapse of which I'm constantly aware as it's already very uncomfortable. I swear after 2 weeks' continuous use it's already less noticeable. Apologies for TMI.
Water. Lots of water. With a daily dose of liquid chlorofylll in a glass.
Writing - either professional research or creatively. I'm building up quite a collection of poetry which I may or may not consider publishing one day. At the moment it's just for me.
A 5-minute breather walking in the garden, summer or winter day or night, makes a huge difference to my day.
And habits I've got out of, owing to lockdown:
Wearing cosmetics. I last put make up on in March. It's saved me a fortune and I now find I don't miss it, so will probably never go back to wearing it again!