I struggle with a lot of "free-floating" anxiety... not related to anything in particular. I always have. I'm almost 70 years old now. And after so many years, I think my body just simply doesn't know how to act any other way. And as I get older, it seems like my anxiety is getting gradually worse. I also experience periodic bouts of paranoia.

I have done sitting meditation in the past. But I've never found it to be particularly beneficial although I still do a bit of it. I do a mindfulness-based exercise routine that is a combination of yoga, some physical therapy exercises I learned to strengthen my low back, & some plain old calisthenics. I also do some walking meditation, particularly late at night when I can't sleep. I'll walk around-&-around our dark & quiet home focusing light attention on each foot as it touches the floor. Thoughts come & go. I simply watch them & allow them to arise & fade at their own pace. None of this is a cure by any means. But it all helps.

Two books that have been particularly beneficial to me have been Jon Kabat-Zinn's book: Full Catastrophe Living and Pema Chödrön's book: Start Where You Are- A Guide to Compassionate Living

Best wishes...