You know you are on the right point by the pain, or tender and possibly electric feel when you apply pressure. Breathe deeply and slowly to encourage your trigger points to release.
Holding your breath tells your body to hang on to the tension. Let it go and breathe. Trigger points should release the muscle tension while you hold the point and it may take 30 seconds or the whole two minutes or a few moments longer.
You will need to come back and work the points several times every day. Do work both sides of the head at the same time and breathe while you hold the points.
You may find it easier to follow this video by Massage By Heather.
Be Healthy. Stay Healthy. Massage.