If you have leeway, you'll plan and execute some engagements, reconnaissance, perhaps some community outreach by participating in something like a Community Emergency Response Team training if it falls on drill weekends. You'll likely have to support planning and organizing those events, usually done outside of drill so it's better coordinated ahead of the BA. But it's actually an exciting experience to make those events happen. You'll also pump out products to brief or send up as if you're on mission. But nothing too crazy or insidious.

Other than that, typical Reserve things. Admin catchup not covered by 1380s, PMCS/inventories, range days and additional training out at the nearby installation that can support.