Why should you write a journal every evening?
There are different methods of writing journals. GoalJo uses a very quick method asking you a few questions every evening to review your day and find out what you could do better next time.
Also you train already thinking about what you are looking forward to the next day. That is a very good habit, because when you wake up and take a look what you wrote down last evening, you already know what you are going to do today and start focused into the new day.