Remote application start So, I'm abroad and I want to stream my music library, I use subsonic on my main desktop (iMac) to stream music to my MacBook Air. So far it's been working fine, but it seems that the subsonic application on iMac has stopped working. The problem is with subsonic only, I can still access my shared files etc.

Is there a way to restart subsonic remotely? I tried to do shared screen but I don't seem to find the right menu for that.
The screen sharing button you mentioned is located in Finder. If you turned on Back to My Mac on your iMac the iMac should show up in the Finder's sidebar. Click on the iMac's icon and you get the screen sharing button.

Alternatively if you know the IP address or URL: In Finder press commandshiftg and type in /System/Library/CoreServices/ to navigate to the place where the screen sharing application is located. Open screen sharing and type in the address of your iMac and connect.