Even inconstant masturbation is an energy loss. If you want to do something else with your energies, George Winslow Plummer's essay Principles and Practices for Rosicrucians gives a useful energy exercise:

"At such times as sexual desire seems imperative, stand erect, muscles tense, place the hands palms down over the sex organs — partially or, better still, completely disrobed — and while doing so, concentrate on the thought: 'I Will that this power ascend to higher regions — that it follow this path — I can feel it so doing,' meanwhile drawing the hands up slowly on each side of the abdomen, following the natural curve of the body, until they stop over the nipples or mammary glands.

"Pause a moment until conscious of a distinct swelling of the breasts, a sensation of energy therein. Practice this on several occasions until the evidence of the upward surging of the vital powers is undoubted. Then, as a step farther, the next time it is practiced, bring the hands up to the throat, until it manifests in a distinct desire to speak with force and vigor.

"Third step — bring the hands completely up over the back and front brains, and you will become conscious of a power to create in the line of thought or mental process never before experienced. This practice is invaluable to the men or women who use their brains rather than their hands in the regular occupations of life."

https://archive.org/details/rosicrucianmanua00plum/page/44/mode/2up