Astrology is one of the three disciplines in hermeticism, but I'm not that disciplined...
You might be like, hermet-what? But that's where your very familiar "as above, so below" originated. Except that's a contraction. The whole phrase is "That which is above is from that which is below, and that which is below is from that which is above, [for] working the miracles of one [thing]" and is just a part of the
Emerald Tablet (just a wikipedia link). Combine this understanding with the kabbalistic notion of Jacob's ladder, and you end up with a much more powerful understanding of cause and effect on different planes and what is (probably) actually happening when you light that candle or whatever spell work you choose.
As for astrology, there is certainly so much more than the sun sign (what most would call the star sign) that makes up the personality. For example, I have Venus in Taurus (astrologers go "a ha") even though I am Aries Sun, Moon, Mercury and Ascendant (astrologers go "woah").
For tarot, other than the Waite-Smith deck, I use the Shadowscapes deck a la my profile pic.
I know that I need to be meditating. I used to to great effect, but such great effect that I really actually need a teacher to help me through it. I much prefer guided meditations, even if that guide is something I've read before going into trance.
Chakra work is fun and powerful. Although I've done my own work on this, it still sometimes sneaks up and surprises me. Like when I briefly did yoga in my last town. One day, the teacher was doing the guided meditation (at the end) and it was a really classic journey "up" the chakras - like, you're walking in an underground cave/tunnel and you come to a passage filled with rubies, red garnets, carnelian, red tourmaline etc. You select a piece from the side and pick it up, polish it and place it in the middle of the tunnel. Next up, amber, citrine etc. You get the idea. Now I wasn't really feeling it so I rather went through the motions in my mind not even feeling like I was particularly deep in trance. Well. Silly me lol. I got to the amethyst and placed it in the middle of the tunnel and kablooie. It was like I'd unlocked a door and suddenly I was flying through the universe. Nothing to note after that, I just got to float around in the big ball of wibbly wobbly timey wimey stuff for a while and it was super relaxing.
So, does poly fit with this for me? Yes, and no. Sometimes I really do think that if I devoted myself to the spiritual practices that I get the most out of (including certain sexual practices) then I would have to really focus on working with one partner. On the other hand, I am deeply enriched as a human being by all my connections and there are definitely spiritual elements to my two primary ones.