There's already so much wisdom in this thread but I'll try to contribute (or echo and agree with) a few thoughts.
- Be honest with yourself. When I was losing weight, my "special occasions" were my birthday, Thanksgiving, and Christmas. When I started maintenance, they eased up to a splurge every month or so. By the time I realized I was 5 pounds over my red line and it wasn't just water weight, I was having "special occasion food" once or twice a week. So for me, I needed to stop making excuses about what the scale said and how my behavior was directly affecting the scale.
- Yo-yo dieting on a very short string. YES!!! Perfect thought. Choose a red line weight and STICK TO IT. So much less painful than what I'm doing now.
- I found that my body didn't "settle" into its new weight for a while. I continued to go down even after I bumped up calories, then bounced up, then to my maintenance happy weight. I think your idea of going slowly, a month at a time, is excellent for that reason.
- Keep setting goals in other areas of life. I had been so focused on the scale for so long (and getting such awesome positive reinforcement from it) that, when losses stopped, it was a letdown. I was expecting that, of course, but it was still deflating. So choose another goal - fitness or a hobby or work-related or whatever - so that that energy and positivity can come from another source.
Good luck!