You can take one of the regular boats from Loutraki Port or Skopelos Town across to the neighbouring islands. If you want a bit of action, try Skiathos with its pubs, clubs and restaurants or should you like an even quieter experience than Glossa, you can head across to Alonissos.
It is also relatively easy to catch a ferry to the mainland. Volos and Aghios Constantinos are the biggest ports and from there you can catch a bus to central Athens where you can enjoy a weekend break.