I do solo tarot card readings all the time as it forces you to think about situations in a different way via the card imagery. I find it helps with decision making. Nothing mythical about it, just a weird form of brain hacking.
Indeed, an old life hack: "If you can't decide, flip a coin. If you're disappointed by the result, follow your heart." Tarot is just this with more bits of entropy.
i pull a card every day and see what connections i can make to my life. or oddly they sometimes serve as kind of reminders: "there's a lack of creative energy" which perhaps reminds me that i've not been playing the guitar in a while. to me they're more like brian eno's oblique strategies [1], than something mystical.