You are right, mindfulness is a big part of DBT and my therapist uses it in my CBT too.

I attend a yoga class which is more therapeutic and meditative concentrating on breathing rather than more physical activity. I have carried this on at home. I don't remember all the poses so I just make up my own - it's all about the mind right?

I don't use my cell phone, but rather a few of the music stations on my cable tv - the Spa, Cool Jazz, New Age.

When I used to live in and around a lot of green space, I would actively stop for short periods of time and simply soak in the nature and tune everything else out.