If you are watching what you eat to eat healthier or to lose weight, the best thing to do is to keep a food journal. This can be used in hand with the exercise journal if you are watching what you and looking to lose weight. Whatever your goal is, you should include it in the journal.
Everyday you write down what you have eaten. If you would like to add calorie counts because they are handy, you can do that also if you wish. If you love a certain candy and have to have one or more every day you may want to include the calorie count to remind you of how much weight it is helping you gain. Just writing the information down in your food journal will help curtail your eating habits.
Writing the information down will help remind you of what you have already eaten, and will remind you of your goal. It is the action of writing the information, which is so important. The journal is a constant reminder of what you have done and what you want to accomplish. You have to decide what and how you should write the information down to train yourself to reach the goal you desire.
You can be creative if that helps you. If you are looking to eat more fruit and vegetables and put stars next to them after you have eaten them because the star reminds you that you did well, then do just that. This is your journal, and it is up to you to decide what will work best for you.