I used a few rainy days last christmas to log in >year 2000 flights as I'd skied the pre 2000 lot in pursuit of tidiness!
Fantastic stats to impress your boss, particularly when you can tell him just how many hundreds of times you've endured airport security scans and sock dances.
Best of all, you can use this data to XL graph your mileage, days away (and airport security scans!!).