Just by accident I came across this list of Skype commands and roles.  I only knew two or three.  Apparently, there is much more.  For those of us who use Skype on multiple devices, checkout /showplaces and /remotelogout :
- /showplaces – Lists other instances where this Skype name is currently signed in.
- /remotelogout – Sign out all other instances except the current one. This will also stop push notifications on all other instances.
And while we are on the subject of not so well-known Skype features, have a look a the complete list of emoticons (smileys) that you can use in the chat. Â These include some more additional icons and country flags.