Im kinda late on this, but... I am a Reiki healer. I find the trick is to have a really subtle/small intention, and to not want to heal different characteristics of the person you're healing. Cosmic energy is smart energy, it knows where to go. You should maybe take a Reiki healing course. Mine was pretty cool.
For a quick 15 minute healing(around 3 mins at every point); I start at the shoulders, then from the crown downwards covering all the chakras. From shoulders to the throat you stand behind the person, and from heart, all the way down, you sit beside the person... while they're sitting on a chair the whole time. And for sacral and root I just hover above the chakras.... The third eye's a little tricky to get. You put both your hands covering their eyes, and the thumbs meet at the third eye (again, done behind the person while they're sitting).
I have done some distant healing too, without really wanting to though (it has happened twice). I just relate to the person really well and in a positive way, and my third eye pours out a bit of a stream for them. Feels like peeing from your third eye hehehe.
Or... people around me, I sometimes just spontaneously heal them. I can see our auras kinda connect. I try not to use empath skills though since I feel it's a bit of an invasion of privacy... unless the person says otherwise; but seriously, it's not needed. You get to the point, with divine outpouring love, that you just handle all kinds of problems with one simple fact; that of unity
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