There's another thread here about setting up IFTTT. Do it.
Nothing against TriggerCMD's own skill but it's a lot easier to say "Alexa, trigger ___" than it is to say "Alexa, ask TriggerCMD to run ____". I've got almost all my commands set up this way. Once you've got the first IFTTT applet set up, the rest are mostly copy/paste.