Simple file to install a trigger phrase: "chill out, bro." The trigger will stop your thoughts for a second, aiding with both mental relaxation and letting go for trance. 

The safeties for the trigger are that it's only usable by you, the listener, and anyone you decide should be able to use it. It also will not work in any situations where a lapse in concentration would be dangerous; a specific example given is that it won't work behind the wheel of a car. 

Enjoy!