Many moons ago, I did an experiment with Liz Hazel involving tarot, astrology, and making a Cornelius Agrippa-style talisman - with 40 other people across the globe doing the same magic at roughly the same time (we had to do charts for the moon's position in a bunch of different locations).
The working lasted for three days, and the results were nothing short of amazing - and not only for me. I wish I still had a copy of the entire ritual, but if I do, it's buried in a cupboard somewhere, and I've not been able to find it.
I think Liz now does the occasional in-person workshop when the stars are aligned for these kinds of workings. If you ever have the chance - get to one! It's a great experience.
You can certainly use tarot in simpler spells, too. If you're focussed, the results can be fairly mind-blowing.