To echo jeffdengr, you are doing it properly. We shouldn't judge our success based on our experience. Even interpreting the results are usually beyond us. At least for a beginner like myself.
It's encouraging when we feel the energy, but we should exercise our faith more when we lack those signs of physical experience. Master Lin says that as you progress with your meditations, you experience a time when the sensations are weaker or completely lacking. He says this is an opportunity for progress, because our channels have been opened.
It is nice to emmerse oneself in these experience. When the tactile is reduce, it is a sign to me to work on the elements of success. Faith is one, confidence and visualization are the other two I tend to work with the most. But that's me. 
You are perfection.
Iam2 