The rules I'd like to follow for my gratitude journal.

• write daily
• list at least 3 things
• write in complete sentences
• feel free to dedicate a paragraph or even a page about the things you are grateful for
• avoid generalizations, be specific
  • explain why you are grateful
• don't journal just for journaling sake, be conscious of what you are writing and allow yourself to feel thankful/gratitude
• avoid repeating the same things you appreciate in consecutive days, there are plenty of things to be thankful for if you allow yourself to reflect on it

"The key is to get in the habit of becoming aware of all the things in your life for which you have to be grateful."