I just retired 3 weeks ago. Up until about two weeks before The Date, I was getting sort of apprehensive. Nervous. Wired and having second thoughts.
I reviewed all my numbers for retirement finance, spent a weekend retesting everything, sat down with my wife and bored her to tears going over everything. She reassured me that it sounded like I had considered everything, and we'd be fine.
I made a conscious decision to stop second and third guessing myself.
That certainty that I was going to retire, and would be OK, is what allowed me to finally really believe that I could let go of things at work. That last two weeks were oddly euphoric, a sort of surrender of work and responsibility to the folks who would be taking over my responsibilities.
Of course, now I have new responsibilities. Should I go scratch the cat behind the ears, or go check on how the roses are doing? Decisions, decisions...