Here’s an interesting quote by William Shaftesbury:

“How much time will it takes?

This is the question that everybody asks. Let it be answered by asking how much time does it take for one who is naturally gifted with personal magnetism to acquire or to hold the power?

It takes no time at all. When the singer whose voice is getting worse is told that there is an artistic position in which the vocal organs may be maintained in order to improve the tones by the mere act of using, he needs no more time to sing with those organs in their proper place than to sing with them out of place.

This is the whole secret of magnetism-growth. How long will it take a young lady to write a letter, spelling her words correctly, as compared with the time required to write the same letter, spelling the words incorrectly?

Yet some routine work must be done.

Speedy results can be obtained by the use of the natural vitality that daily loses itself in the drift of life. Where the waters of Niagara rush to seek their quietude in the volume of the lake below, the building of steam engines where Nature’s forces are mightier than man’s inventions, would be the adoption of the lesser for the greater. For endless time there has run to waste in one region more power than needed to run all the machinery in the country.

In like manner, each individual carries in his own body and loses daily through drifting habits more energy than most magnetic man or woman that ever lived needs to give absolute supremacy to active life.

It’s true that we can acquire power by building the steam engine on the banks of Niagara, and that the steam so employed is a natural force, as gravity is; but economy prefers to use the power that is at hand awaiting man’s bidding, rather than go to the trouble of generating it in less quantity and energy. The work before us is to acquire the most satisfactory results in the briefest time and with the least effort.”

For me, the true secret of keeping your magnetism lies here. Once you have developed it, there’s little to be done regarding maintenance. You just keep the same habits you have developed.

It doesn’t take much to act with magnetism rather than without it.

Once you’ve learned it, magnetism is self-reinforcing. Whether it’s personal magnetism or sexual magnetism, the result is the same.

You just learn how to connect with it and it’s now a part of you. Just like learning how to write well:

“How long will it take a young lady to write a letter, spelling her words correctly, as compared with the time required to write the same letter, spelling the words incorrectly?”

That’s the key to the whole work!