I like to make almost every weigh in count by hoping to achieve chunked-down mini goals. It's fun to look forward to the "will I make it to___ this week? " feeling and it really keeps me focused and motivated to do my very best every single day.
Sometimes it's getting to a mini goal based on total lost, sometimes it's getting out of 30's entering the 20's etc. Other times, it's reaching percentage lost milestones or making some headway down through the BMI charts. One way or another, I've always got a reason to succeed each week.