DH and I are planning to retire within the next five years. (Meaning: December 31, 2010 is our target date, but there are a couple of factors that could move the date up some.)
We already know the area where we want to retire and have been visiting it on vacation for the last few years, even went house-hunting two years ago. With the equity from our current house, we expect to not have a mortgage, or to have a ridiculously small one.
We've talked about trips we want to take, and have ranked them in order of interest or priority.
As for day-to-day living, we both have hobbies and interests that we want to devote more time to, and we've discussed taking part-time, low-stress jobs strictly for the benefits (i.e., bookstore employees generally get a significant discount, and both DH and I are avid readers), but that's not set in stone.
So we're making general plans, nothing specific. We'll adapt and adjust as it gets closer to time.