I'm excited to return to sandbox play with my gaming group. It's fun for them and it's fun for me AND it keeps me on my toes. I do expect to keep the game moving via G+, emails and Obsidian Portal in between game sessions, as it will allow me (and them) to be on the same page with the start of each session.
Our next session of the S&W Wilderlands Campaign is in 2 weeks, and between now and then I want to feed my players some plot hooks and rumors and then get a feel for where they want to go. I can ready three or four adventure and let them decide at 915 on a Saturday night and hope for the best, or I can give them some leads and see which ones they want to follow up on. Basically, putting the majority of my effort into the directions the party wants to go in.
Do you, as a DM, run minor events / campaign maintenance in between sessions, or do you try to get everything accomplish "in session"? Why or why not?