Great post there! For me, mindfulness is putting pen to paper. I often gain so much more clarity as to what I need to do more of, and or less of, and feel a great sense of relief when things are there in front of me in black and white.
If I want to really chill out and switch off, I play solitaire on the computer, or games on my phone. sometimes I just need to 'numb' my mind, or at least slow it down a bit.
Mind you though, since I got my motorbike learners, just before Christmas, I have discovered that that too is a WONDERFUL release of stress and tension! Motorbike riding is awesome fun and I love it! It's just me, and the wind in my hair! ..... well, with the hair that's not all covered by my helmet anyway.
And yes, prayer and meditation are also great for practicing mindfulness. And I can do that at any time I like.
Although I don't really listen to pod casts or do online meditation either, so I can't really recommend anything in that regard.
Anyway, take care. Hope you get some more great ideas. xo