Finances seem to get front page coverage when reading, discussing, or considering retirement -- and yes, financial planning is important. However, there are many sources of information on this aspect of retiring.
In our experience, just as important for a quality retirement experience (both for health and happiness) is the adaptation to the new situation. We believe it is imperative to have exciting, engaging, and broadening events to anticipate in those retirement years. One should be absorbed in interesting experiences -- and every individual defines that for themselves. There are no guides or prescriptions to success in this area that are really effective -- it is an individual choice, and each of us is different.
We have discovered that those without the excitement of wanting to get out of bed and get going with something interesting soon wane in mental and physical ability. Nothing is more debilitating than slowly turning into a vegetable because there is "nothing to do." Get into tractor pulling, fishing, building Habitat for Humanity houses, taking hikes, traveling, working up your genealogy, ... anything you find absorbing and interesting.
Yep, check out the finances (and sure, live on that projected retirement income for a year while still working is a great idea), but we think, most importantly, be busy considering an exciting life, and plan your financial needs for that projected future life -- probably (and hopefully), it will be very different than your work life.
Just some ideas from 20 years of wonderful retirement (and, by the way, we loved our jobs) ...