This is an age old problem. Dion gives good advice regarding not mixing magical systems. Mind you what are called newage beliefs and practices today are actually a mixture of many different systems, which will become obvious as you work through Bardon's works.

Franz Bardon has provided the most reliable, practical magical development system available, that I know of anyway.

It is ok to use my energy work methods with Hermetics, as the energy work is not a magical system per se, so will not interfere with actual magical processes.

Robert Bruce