In magic, there are some lost areas and lost knowledge. Stuff that is ignored or even unknown to the present generation of instant-YouTube-magicians. Sometimes, this knowledge hides well in books and magazines. But it is well worth being resurrected and digged out (and applied).
Slydini did some things and explored areas in magic that are completely forgotten in these times. There is a very useful ebook-manuscript by one of his students which details Slydinis approach, all with the counting (heartbeat rhythm), timing and the other things that made his magic so outstanding and deceptive.
Same for the Professor, Dai Vernon. Such a lot of fundamental wisdom and insights into the inner workings of magic, it is just incredible.
Bad thing is we forget these pieces of advice if we don't write them down and keep them in a notebook. Best if that notebook is dedicated to wisdom in magic.
Years ago, this dawned on me, and I collected ideas and words of wisdom. I put them into my dedicated notebook, and since then, this has become my most treasured notebook. By writing these ideas and concepts by hand, it forced me to think about them whilst writing, and that helped me to memorise and internalise them.
I suggest next time you go hunting for tricks and new moves, ignore these and focus your attention on the words of wisdom. There are a lot of sources to start your journey, just to name a few here:
Dai Vernon's and Charlie Miller's columns Magicana in the GENII magazine.
John Ramsay's thoughts on misdirection in his books.
Interviews with Roberto Giobbi in various magazines (Roberto is a master at extracting precious and important knowledge from the books, and he draws on a decade long experience).
All of Patrick Page's works.
Go hunting for the wisdom and incorporate it into your work. The rewards will be enormous.