Right click Panel > Add to Panel, double click Force Quit. Hey presto, Force Quit applet is added to panel.
System Preferences > Keyboard Shorttcuts, scroll down to Run a Terminal, then pick your shortcut keys.
Alternately, install Yakuake or Tilda, both drop down terminals like the one in Quake.
Dell Latitude/LM13 Mate 64
F@H Team Linux Mint on an i7 3770 @ 3.4ghz/CB11 64