I started my plan on May 22 and then shortly after, joined a challenge that went until July 31. It worked out to be exactly 10 weeks for me, so I decided to challenge myself to that - staying on plan for 10 weeks. Making that commitment to myself has been more powerful than I expected. Especially as time has gone by, I am less and less inclined to be willing to go off plan and break my streak. Even if I momentarily think about it, I decide that I'm not going to blow the 7 weeks I've put in already.
At the same time, 10 weeks is a short enough time period that it didn't feel so overwhelming to commit to. It's not the same as making a promise that I was going to stay on plan until I got to my final goal, because that would feel like something I could never do. But 10 weeks? I can do that, and I AM doing that, with less than 3 weeks to go now.
I'm not planning on going on a binge, or even going off plan when the 10 weeks are up. More than likely, I will roll right into the next 10 weeks. But even if it's just playing a mental game, doing 10 weeks twice seems easier than 20 weeks. (and hopefully 10 weeks 3 times vs. 30 weeks, etc).
This was a new way of looking at things for me, so I figured I'd share in case it might help someone else.