Ever been stuck in a hotel room in a new city, with your mindfulness disturbed? I feel that way all the time. I have to travel for my work. Sometimes it's fun, but lots of times it just doesn't contribute to a peaceful mind.
How to sit? Hotel pillows don't do the job. Here's a product I've been using when I'm on the road. http://www.stillsitting.com/sitting-on/travel-zafu-new.html
Not as good as your real cushion, but better than nothing.
