Are you a paying member? If so and you have access to Lifeline on-line, I would read the inspiring stories there. That is what helps me keep going.
If not, there are plenty of inspiring stories on here and in the magazine. There is a new magazine out now.
Another thing I try thinking about is not how I am feeling now, but how I might be feeling in a couple of weeks time.
I.e, If I didn't stick to the plan and put on a stone over the next 10 weeks I would feel devastated.
If I stay the same weight, I would be 'ok'.
If I lose some weight, I would feel great!
I hope you get your motivation back soon. I know how difficult it is when it deserts you.