I've started making plans about things in the run-up to FIRE, because we have a bunch of cascading plans that are related to our rough date 2 years from now (we don't have an exact day or even month, since we may have at least one job change and move coming up, but expect that it'll be about 2 years):
* Figuring out what metropolitan area we want to live in after FIRE -- we've been working on this for years now but still haven't quite reached a decision
* Baby-related stuff -- we're planning to have our first child, ideally, right before FIRE so we can take advantage of generous parental leave policies provided by our employers. (This will be hard to deal with, since we're planning a cross-country move shortly after that, but I'm anxious about Biology and will be happier if we get started early.) This means it's almost time for us to start learning as much as possible about parenting, now ...
* Sorting out what communities we want to be part of, what matters to us in life, what kinds of things we want to do in FIRE so that we can start doing those now and not feel too adrift when we get there.
One thing that's bugging me is that ideally, I'd like to do some independent software development after FIRE; making new businesses, freelance, something of that sort -- but I can't really start now, because my employer has a very restrictive IP agreement that makes it difficult for them not to own everything I make.