How do you best use social media within your command and remain professional?

Leaders must be very careful in this regard.  That's one of the things that makes RallyPoint unique - this is a professional social media site.  LinkedIn serves the same purpose.  Facebook friendships should be scrutinized because you can both expose your personal life (if you share that much on Fb) and learn more than you want to know about your fellow troops.

Jacob, my rule of thumb is to not have a facebook connection with anyone in my current chain of command. It has worked out nicely so far. The most people I have ever connected with afterwards, though, were my old Company Commanders (most of which are MAJ now-and provide good mentorship across great distances) and my old Platoon Sergeants and First Sergeants (most of which are now First Sergeants and Command Sergeants Major-also still providing great counsel).