* Write date in journal first thing in the morning when you wake up and keep the journal open next to you while working. This reduces the friction of starting.

* Look back at it at the end of the day and see what you've done that day. This is your reward for using it. Alternatively you could have your own reward.

* If you forget to do it today, restart tomorrow without any fuss. Don't worry too much about the lost day, like I used to.

In the beginning I was pretty excited about it and it was real easy, but after couple months it got a little old. Eventually I got around to the point where if I don't write in the journal while working I feel uneasy.

The only solution is to never give up! If you make it 3 weeks before forgetting, then when you realize 6 weeks later, start again until you forget. Repeat ad infinitum.