It sounds like a very good start. I can easily see how the use of letter can help with remembering the gestures. Let me know how the distraction one goes especially, because I have similar issues currently.

I'd say just monitor the process carefully. One, by trying to learn multiple gestures at once, you risk burning out on all of them. The two week timeframe seems like a good counter to that. Also, as I mentioned, be careful with a gesture for negative thoughts, especially because you have it linked to a letter. The gesture should be as general and sensation-linked as possible. That way you don't ever spark negative thoughts as a result of the gesture.