Anything that actively moves energy in the body. For example trance meditation (leading yourself into a state of mind awake/body asleep) will naturally open energy channels, tactile imaging (which is where you imagine feeling tactile sensation such as massage etc to move energy) works very well, visualization works for some but never worked for me, horse stance, tai chi, basically anything that brings awareness into the body with intention to move energy. you definitely want to focus on grounding to the earth. Energy work by robert bruce is a pretty good read.
Remember also that all energy is sexual/emotional energy. It is not some abstract thing you have to discover. You just have to discern it from the myriad of other sensations in your body (mainly pain lol)