People tend to limit themselves to techniques that are already out there.
These can be helpful, but they are desgined for the person who made. IN order for you to get the greatest benefit from your work you must allow yourself to be guided to doing things that are natural to you. You may find that when healing , someone tells you to use green, but you find that blue works best for you. I work with the light. This energy I work with is of a much higher vibration to that of astral.