If your job gets too much, then it's time to stop and retire.
There are plenty of other jobs where you can be productive but it's not as demanding.
Wal-Mart is always hiring. Just saying.
Find a hobby...I choose a new one every couple years...painting, sculpting...but I have my old stand by...History...our local Historian calls me every few weeks...and I get the opportunity to do some research for a local resident. Bonus...my son, who works out of state, always helps me with these little projects.