With an update since getting it back:

This is likely an oversimplification, but I think that we can break down correspondences into three main categories:

Cultural Correspondences - these are often heavily steeped in the mythology and folklore of a particular region. They are often but not always correspondences of items found in that region. This is where correspondences become the most varied because, despite what you may have read in Those Bad Witchcraft Books, culture is not universal. A great example of this is that most Western cultures associate the color black with Death and Mourning but a lot of non-Western cultures have the same association with the color white. It stands to reason that this type of correspondence will work the best for you if you are sticking as close to the correspondences of the bioregion that you grew up in as possible (1) and that they will be most effective when used magically on somebody else from that bioregion (2).

Material Correspondences - these correspondences are based on the physical properties of the item in question. Some plants are edible, some medicinal, and some poisonous. Things with thorns can hurt you when you touch them. Quartz has high levels of electric conductivity. The idea here is that if Rosemary repels insects, it can be used in a banishment spell to repel that unwanted "insect" from your life. These are, in my opinion, the immutable correspondences - the item you are using will ALWAYS carry its physical characteristics with it into your magic. Spicy peppers will always be Hot and Burning, so-called "Weeds" will always grow tenaciously, and Sugar will always be Sweet. It is worth keeping in mind here that when using plants, the part of the plant may affect whether it carries that correspondence. Sometimes only one part of the plant carries a particular property - consider the difference between the sweet scent of rose petals that we use in love spells versus the sharp thorn that would be better used for protection. 3. Sympathetic Correspondences - The base concept behind sympathy is that two things that are alike in some way share a connection with one another that can be harnessed magically. The more alike that two things are, the deeper the connection. There are many ways that this is used in magic. A lot of herbal correspondences involve sympathy through the Doctrine of Signatures. This is the thought process that anything shaped like an ear can be used to affect ears/hearing magically. The Doctrine of Signatures gets rolled in a little bit with Cultural Correspondences as it is heavily rooted in Western herbalism, but it deserves a mention on its own. Another way that sympathetic magic makes its way into correspondences is the idea that an object from a particular place carries some of the energy of that place which can be harvested for magical intent. You see this in the use of bank dirt in money spells or cemetery dirt in baneful magic. This is also where Holy water, moon water, and stormwater come into play - here we are assuming that something that has been done to the water (being blessed by a priest, charged in the moon, or collected during a storm) carries an inherent energy that can be then transferred to your spell. Depending on your viewpoint, you may or may not agree with the concepts of sympathetic magic.

And that's the whole point of this. Witchcraft, as a whole, isn't the sort of path where you are supposed to proceed based entirely on blind faith. If you're flipping to a certain page in Scott Cunningham's infamous Green Book and finding the first money herb you come across to use in a spell, you are probably doing yourself a disservice. I suggest that you look closer. Not only will the physical correspondence change how your spell manifests (I've written about this before) but you may find that you don't even BELIEVE or AGREE with that correspondence at all. And maybe that's not important to you (but if that's true, why are you even reading this?). But I suggest that it should be. That understanding of a correspondence deepens your connection with the energy of the item you are looking to use. Moreover, exploring it further may give you all sorts of juicy ideas for spellwork to augment that energy.

Looking into the What and Why of correspondences is both an excellent critical thinking exercise and a good way to get a better idea of both the history of witchcraft and how magical systems work. Also, let me highlight this quote, because it sums up the matter rather elegantly:

And maybe that's not important to you (but if that's true, why are you even reading this?). But I suggest that it should be.

i don't think enough people are taking advantage of using desiccant packets in baneful workings

Reduction

Dwindling

Withering

Stunting of growth

Removal of a vital resource

Denial of metaphorical nourishment

Malefic preservation or stasis

lighting candles in jack o'lanterns (to keep away the fairies)

roasting s'mores on bonfires (to keep away the fairies)

bobbing for apples, fortunetelling, ouija boards, and other assorted divination rituals (to forewarn those doomed to be kidnapped by fairies)

haunted houses (to preach against the dangers that lurk across the veil in the otherworld, home of the fairies)

community effort to stuff kids full of candy (that if whisked away (by the fairies) they might resist the temptation (of strange fae foods) long enough to escape)

the screen act

kosa

the interstate obscenity definition act

and keep calling visa, mastercard, stripe, and paypal, and ask them to let adults buy adult products.

our lives matter more than your fucking nostalgia.

everyone SHOULD make a zine too, you will feel so good about it 🫶🏼 it's about putting the power of production into the hands of the people! also you don't have to sell it or anything, you can just make one for yourself or trade/give some to friends!

i really love julia grofrer's guide to analogue self publishing aka making zines on 8.5x11 paper

and jaydragon/jdragsky's thread on staple's self serve print centres (if you're area does not have a local print shop, they probably have a staples or fedex print centre)

if you can't draw, here is twitter thread for public domain art and also a mini summary of when thing enter creative commons (generally 70 years after artist death in the US and CAD)

i also have a DIY zine page on my art blog that i am dedicated to updating as i find more resources! (not accessible through tumblr mobile app, mobile friendly, just open the link in a browser)