If you sit at a computer all day (and don't wear shoes) I would suggest getting some massage balls and rolling them under your feet. It definitely helps toughen up my feet at least, and it's basically a mindless activity. The only bad thing is that it leaves marks on my feet that I need to scrub off.
Screenshot 2023-05-27 at 12-02-00 Massage Ball Set Good for Myofascial Tension Release Trigger Point Therapy Massage Balls for Foot Back and Shoulder Suitable for Use After Exercise (Red_Blue-2 Pack) Amazon.ca Health & Personal Care.png