This is a great idea.

One of the things that has helped me the most is reminding myself that it's okay to WANT things. I spent such a long time trying to stave off depression by focusing on gratitude all the time. Gratitude is a wonderful thing, but I took it to an extreme. I was afraid to strive for anything more than what I already had because I thought that would be an ungrateful thing to do. I had talked myself into accepting the status quo and constantly reminding myself to just be grateful that things weren't WORSE. That ended up being self-defeating.

I didn't start to face and tackle my agoraphobia and anxiety until I began telling myself that it was okay to want a fuller life. My therapist helped a lot with this. I had to accept that wanting a good job, a social life, travel, love etc. aren't signs of ingratitude... and it was hard for me to admit that I wanted those things (because I was so afraid I couldn't have them). I had to work on envisioning myself having those things again, and telling myself that I'm not undeserving or unworthy of those things. I needed to set specific goals for myself and think about the ways in which I could work at attaining them and fight the urge to consider myself ungrateful for wanting.

P.S. Something else that has been very productive for me has been knitting. I'm not calm and focused enough to meditate, but when I'm engrossed in a knitting project -- just focusing on my hands and the stitches, the sound of the needles clicking, the feel of the yarn sliding round my fingers -- it's like a form of meditation for me. I go into a state mindfulness. I'm in the moment and free from stress and the maelstrom of thoughts that rush through my head most of the time. Yoga does this for me too.