Retiring without a plan has always been a no-no.
I'd like to see an accounting of self-reported reasons for retiring. Quite a few folks hang on until they have major medical things happening, and are "retired" by events rather than choosing to retire out of desire. Those folks are not surprises when they health issues catch up with them.
Regardless, one should have more of a plan then to "travel more" or "fix up the house". While fun for a stretch, they are not really plans.
One should also look hard at your marriage and make sure new or lingering problems are not catastrophic when you start spending several times as many hours together.
My spouse was on travel recently with people. Had dinner with them and his boss. One of the guys talked about how great it is to be older and "do whatever you want at work, work from home, etc." My hubby said "you know, maybe, but I can start to see the advantage of retiring, and I can picture it now" (he's 51). His boss kind of freaked out, because my husband is pretty critical as an employee. But hubby said "don't worry, I have 15 years to go, I've got a 2nd grader". Still, boss said "hey, instead of retiring at 65, maybe wait until your WIFE is 65". My husband said "you know that only buys you 2 more years, right?" Ha! He thought I was much younger.
Anyway, now that we are 50-ish we can picture retirement a bit more. Volunteering, housework, cooking, gardening, doing errands on foot, exercise.