I hope some of this helps. Yoga helps me deal with my Crohn's-related joint pain, especially my hips. I haven't been able to meditate successfully, but I feel like I almost can after doing some yoga, but brain just won't shut up. ;)

For plantar fasciitis, I've done all kinds of stretches and rehab exercises my doctor gave me. The things that work the best though are rolling my foot over a frozen water bottle (I see in another post, you mentioned the tennis balls too), stretching the bottom of my feet, stretching by hanging my feet over the edge of the stairs, and calf stretches. The YouTube channel Heel That Pain has some excellent videos. Also, wearing my Birskenstocks helps a lot and they work almost as well as custom orthotics (and I got mine dirt cheap too).