I would focus on relationships, spending as much time as humanly possible with family and friends (hopefully without disrupting their lives for 5 years, lol). I'd probably continue to work and load up on as much life insurance as possible - providing a comfortable lifestyle to survivors is a much bigger priority than scrambling around trying to complete activities on some bucket list!

Of course, given the uncertaintly of life, we should all be engaging in our 5 year plan right now, despite the absence of certain impending doom, right?