Wendy,
It can be helpful. My suggestion is to start small, and try different methods until you find the method that works best for you. When you find that method, commit to stay consistent with entries. One big benefit is the reflection on past notations, especially when viewed over a greater time span of weeks, months, and even years. That's where we will see improvemnet, growth, and perhaps trends that suggest weaker areas we can work on. Good luck.
Barry Westling