Keeping a spiritual journal is a bit different. Of course I wind up writing other things in it too, but a spiritual journal is a way to keep in touch with how you are doing on your walk of faith, looking at the trials, tribulations, joys, and wonder of how God is working in your life. Some people use their spiritual journal along with scripture reading, writing reflections from what they read in scripture. Other people use it to write down problems that they are having or troubles that occur. Others use it as a way of thanking God for the many blessings that he provides them.
You don't have to write in your journal every day, a few days a week or a few times per month is okay too. If you do not currently keep a spiritual journal try doing it. You might be surprised at what you find out about yourself!
1. Write down all the key people in your life who have effected you either positively or negatively. Write down a few sentences about each person. Write down how your relationship has changed or altered over time.
2. Write down all the "graces" or "blessings" in your life. Some people do this every night before going to bed as a way of thanking God.
3. Write down a few sentences about the various books that have helped you along your spiritual path. What about those books inspired you?
These are just a few ways to get started. I wish you well as we all walk the hard long walk of faith.