I print off a copy of my trips and times at the end of each month and file them into a mystery file that I use to update my logbook about once every 3 years or less.

Some pilots carry around a little book so they can write down a ton of numbers at the end of every single flight. These are usually the same pilots who have button pushing disorders.

I have found it takes me less time to get all my flight times printed on paper for the entire month than it takes them to write down their times for each leg of the day.