OK - here is your supplies list:
a nice, clean sheet of paper
your favorite ink pen (this could be an excuse to buy a new one - I love to buy paper/pencils/pens)
a comfortable chair
coffee/tea/something cold - your favorite refreshment
peace and quiet
Now - write a letter to yourself. This letter is to be read OUT LOUD whenever you feel like (or know) there is a slip up approaching. You already know how it feels - anxiety, stress, low self-confidence, motivation lacking - you complete the list. This should be a really long letter. In it you will detail what is about to happen and why. You will also recall times in the past when this has happened. You will also need to include an action plan because you really don't want to do this again. Is there someone you can call and talk this through with? Do you need to get out of the house? Will you visit someone? Why read it out loud? You will be using more of your senses that way. There will be more of an impact.
This letter can be revised and edited as you have more insights and thoughts. If any of you would like to share your letter on your blog, let us know so we can learn. I realize it may be too personal for that.
This could be a journal activity. I have had journal activities in past posts. You could keep your logs of eating and exercising. Good days could get a gold star on that page. Before and after pictures would work well.
Let's be pro-active. There will be a test.