I don't know if anyone else is as anal as I am, but I created an Excel spreadsheet that tracks my weight each week (on Saturday), the amount lost each week, a running tally of my total amount lost, goals, BMI changes, body fat % changes (they have on of the little hand-held body fat calculator things at the gym I attend), and measurement changes. I'm weighing each week (well, recording each week -- have to admit I'm jumping on the scale a lot in between) and everything else monthly. I'm hoping that seeing it on the screen / on paper will help me to be more committed to watching the numbers drop...and more even-headed during those times when they don't.
I also have little "conditional formatting" things in there to do fun stuff when I reach good points, like changing the text color to green when my BMI reaches normal range, and turning the cell bright yellow when I hit at or below goal.
If anyone wants a copy, let me know. If there's enough of a demand, I'll probably stick it online somewhere -- otherwise I can email.