^^^ Great examples from Jim, just "being more positive" isn't a measurable goal. But Jim gives specific steps you can follow to achieve that goal. Write these and/or others down and at the end of the day go through and check them off and celebrate your accomplishments.
Some of Jim's suggestions echo things Steve has been recommending to you for weeks/ months. Focus on the good things in your life! I know it's not easy when you are going through this, but that's what GAL is all about. It's hard to do at first, but with time it gets easier and more enjoyable.