I've successfully kept off 33 lbs for 5 years, but I still am trying to get off this last 17.
When I lost, I went from 200 to 167. It wasn't that I had hit a goal (I didn't even have a goal in mind, I just changed my life to eat right and workout). I stopped because my routine changed, and I didn't make the effort.
I felt I had accomplished a LOT, so I focused on maintaining at that point. I was active, but on no regular timetable. I continued to eat well, but I wasn't quite as stringent. I started enjoying a few drinks again (although I was quite a lightweight at this point, not having had any alcohol for 6 months!).
Personally, I was relieved to be able to mentally relax a bit. I focused on other things, and kept most of my healthy habits. I went out with friends and ignored the wings, but had 2 drinks. I had a burger now and then, but without the bun. I wasn't obsessed with finding healthy options, but it felt natural...does that make sense? It has been 5 years, and I still gravitate towards lean meats, veggies, etc.
If you want something new to occupy your thoughts with, can I recommend either cooking or exercise? You could start trying out new, tasty, healthy recipes, or get into any number of activities. Weight lifting, in particular, because you need to know the proper form, best nutrient options for best results, etc. It can require a lot of research, and it can be quite addictive when you start to see strength results! And no, you will not bulk up. I've noticed an amazing change in my body, but it is toned and lean. Just a thought