Ubuntu: Open a new terminal window with a keyboard shortcut

To open a terminal quickly navigate to System → Preferences → Keyboard Shortcuts. There, click the "Run a terminal" row (It should be in the "Desktop" section) and press the keyboard shortcut you like.

If you cannot find such an entry you may need to add it yourself -- the command for Ubuntu's default terminal is gnome-terminal.

Be aware that many programs use shortcuts of their own and you would not want to clash with those (like Ctrl+T). Something like Meta Show archive.org snapshot +T is something usually not taken and works well.

While you're at it, you might also like to change the default size of your terminal.