To begin, a definition of energy, the one that will henceforth be used in my documents.
Energy: The constantly moving force that powers everything in this universe.
That being said, it can be used in an infinite amount of ways, as it powers everything. But to begin, you must learn how to feel it.
All creatures have the ability to sense energy. The use and manifestation of this ability varies, much like human taste or smell. Energy may feel to a person as sensations such as tingling, electricity, heat, cold, or most anything else that can be quantified. The first thing for anyone who wishes to use energy is to discover and quantify this ability, as much as possible.
This can be done in many ways, but the simplest if you don't have someone who is a good energy worker around is to listen to a certain type of music. The type is whatever gets your mind racing, blood pumping, etc. When you listen to it, you probably feel something you only feel rarely at other times. This is the feel of flowing energy. Next, the first basic tool of energy working: moving energy.
To move energy, there are many visualizations. I will explain mine, as I know no others well enough to explain. I "feel it moving" and it moves. This means, to me and those I've personally taught, that you imagine the feeling of energy moving and concentrate on that feeling being where you want it to be, and it will tend to move there. By concentrating in that way, you cause it to be the path of least resistance, much like electrical flow, which energy flow often mimics. After this basic skill is learned, an explanation of what the movement of energy means often helps make things much easier.
Energy is constantly flowing through your body, in some amount or other. The techniques so far have been taught to sense and move a very large amount of energy, as this is easier at first. With eventual refining, smaller amounts may be moved and cultivated. Many of the problems in the human body are caused by incorrect energy flow, and some that aren't caused by incorrect energy flow can be fixed by altering it in some way. Now, another basic technique, and probably the first one that is noticeably useful: the most basic of healing techniques.
There are many ways to heal, but the simplest to grasp at first is to move a large amount of energy to an exhausted muscle or muscle group and hold it there for a while. This sort of simulates putting a hot pad on the injury, but will not inflame it like heat will. It also can speed the healing process by providing more energy to your ailing cells. Do not do this for headaches, or on something that is spasming; instead, do the opposite and move energy away from those things. You can also do that with muscles that are inflamed, i.e. something you'd take an anti-inflammatory drug to cure. These are the two most basic techniques, and by themselves can help improve your life quite a bit if done correctly.
After learning these basic things, you can learn much more advanced skills through self-experimentation. I will explain more about the skills that I use, but they are just a small portion of what can be learned and done using energy.
-Accuracy