Hopefully your organization invests in a great culture (there are lots and lots of ways to do this, just search a little…), but you, as a leader, have the ability to make or break that culture within your own team.  Make it a fun place to work.  Be the leader you would like to work for.  Smile.  Celebrate what’s working, start meetings with victories and focus on what you want to see more of.  Surprise your team with treats (listen, so you know what they like) and have informal subgroups that celebrate holidays and milestones.  Know your work volume so you can make things fun during the down times.  Work hard, play hard.  It’s up to you.  Get all in or get all out.