My choices are similar to Sameen's. While I've assigned rewards to every 5 and 10 lbs (this time and my last time around
), I tend to "splurge" on tools that aid my weight loss. A food scale, a new exercise DVD, new hand weights, a new bathing suit, running shoes, etc.
It has an interesting effect. Sure, some might say it'd be good to have all these tools from the get-go to help the scale move faster, but because the changes are implemented gradually, I'm more likely to adopt them in as new behaviors. Putting off the purchases makes me desire having them! By the time the food scale arrived, I was actually excited about it and very motivated to use it.
I know you travel frequently, and so might be less "stuff"-oriented, but would this approach have any value to you?