Set up live gigs with each other, announce gigs you're playing around the country or whatever, talk about how the show went, post links to recordings, etc.
Hey yall, I will be on KUSF in San Francisco (listen here: http://www.kusf.org) at 1pm PST today with Pet the Bunny to promote our show next week at the Hemlock Tavern in San Francisco. Tune in for a good laff!