When you retire, don't be sad! Be happy!
I am never going to be able to retire, so I admire you.
If I could retire, do you know what I would do?
Crafts such as coloring, painting, gift baskets, gift jars, wreaths, etc.

Unsplash
When you worked, you probably had to eat a little here and there. Now you can cook whatever you want!
Walk in place to music, use a stationary bike, work out to exercise DVDs, do Tai Chi on your own or as seen on YouTube, etc.
Do a Random Act of Kindness. Cook a meal for someone. Bake a cake or a pie for someone Do extreme couponing for donating items such as personal necessities, food, drink, etc. Donate clothes and shoes.
I would love to be able to travel! am afraid of flying though. If I were you and given the chance, I would go!
I would shop for desperately needed matching clothes and shoes. None of my clothes and shoes match! They are all thrift items. But, only on sale.

Unsplash
Now that you do not have a supervisor breathing down your back, do what YOU want!
Just think, you are FREE.