Whereas, I have been criticized by my players for not doing mountains of blue-booking between each session covering each and every minute of downtime.
I recently tried an experiment: I told them "You are going to start your next adventure HERE. You are currently THERE. It's a three month trip across hostile terrain; here's some of the known points of interest. If you write a short story -- a page at least -- detailing one adventure you had en route, you get half the XP needed to move you to your next level and a level-appropriate magic item of my choice."
This way, they get to define something of their non-combat time and get material rewards, and I don't have to do




.
I can also be sure anytime they enter a town, at least an entire game session will go by with them running hither and yon meeting every NPC in the place, each according to their own personal interests -- the Oath Of Poverty druid will be looking for oppressed people, the warforged tinkerer will be looking to fix things, the bard will be looking to get laid, etc. I basically need nothing but a bunch of NPCs and agendas, no real 'adventure' at all.