I'm currently reading "Synchronicity" by Kirby Surprise, published 2012, which discusses how people would be able to cause coincidences based on their conscious or subconscious thoughts. Pretty much what occultists refer to as magick.
And the author also describes how this ability, if one uses it without realizing it, can easily lead to delusions, paranoia, conspiracy theories etc., especially in schizophrenics, due to interpreting too much into the coincidences and not realizing that they cause them themselves.
Now, I'm having the opposite problem, I rarely encounter coincidences, and most magickal exercises I try don't work due to my skepticism, so I'm reading that book to influence my mindset into being more open to see coincidences, and to find out whether the author recommends any exercises.
Well, since the author expects the reader after about 1/3rd of the book to already notice an increase of synchronistic events I guess I'm just especially untalented at it, now being at 2/3rds. Or I'm just reading it too fast.
I'm not convinced yet that synchronicity exists objectively, but it is something that even if it exists objectively would be very difficult to prove to exist. And I see the benefits of perceiving existence in a way that includes the possibility of being able to cause synchronistic events, that's why I'm trying to train that.
I don't dig the "scientific" explanations the author provides for how synchronicity could be compatible with the laws of physics, but he in most sections is at least honest enough to say that they are not really explanations and just guesses. Otherwise it's quite nice to read. He also makes the difference between being bound by a religion, and using beliefs actively for one's own benefits, i.e. a central aspect of the RHP/LHP-distinction by my understanding, but probably without ever having heard of the LHP.
The exercises he recommends thus far are learning how to do lucid dreaming, and practicing to create thoughtforms (he calls them both thoughtforms and tulpas but they are not self-aware nor bound to one's own body by his description so they aren't tulpas by the definition of tulpa I'm familiar with). Both of that seem quite advanced practices.
He also describes the neurological way in which specific meditation exercises can lead to satori experiences (feeling one with everything for a few moments). He says if one does them for about 6 weeks 1h per day they are quite fool-proof to cause that. I do fairly similar meditation since quite longer than 6 weeks but only 20-30 minutes at a time, so I can neither confirm nor refute that claim.
But well, I at least decided now to dedicate some small notebook I recently bought to noting down whatever coincidences I encounter (encountered 2 today thus far which however are both far from unlikely or surprising) in order to train my ability to notice synchronicity if it does occur and to influence my mindset a bit further.