How do you work with sigils that can be re-energized or recharged?
I was doing a tarot reading regarding a magical working I could undertake. I asked what kind of work should be done, and the answer pointed to something simple; a sigil immediately came to mind.
Next, I asked how I should energize it and drew the Four of Pentacles. I interpreted this to mean that the sigil should be something to keep, rather than something activated once and then discarded. The Four of Pentacles made me think of physically keeping the sigil somewhere—preserving it and possibly re-energizing it periodically. The association with the Earth/Pentacles element also suggested the idea of permanence and physical storage.
So, my question is: how do people here practically work with sigils intended to be kept and re-energized repeatedly? Are there established methods or good sources—books or publications—on this type of practice?
An additional question: would you consider a sigil suitable for this kind of work, or would you use a different type of magical technique?
Thanks in advance.