You can link other Microsoft products to Journal so that you might track how much time you spent on a particular document (again, a great billing tool as well if you charge by the hour), worksheet, or database. You have two options when it comes to using Journal to track time. You can either specify which documents you want to follow, or you can follow all documents that you open and work on. If you choose to set up Outlook to do the later, you will want to go through and weed the information you do not need periodically.
To set up journal to track time, click on the journal icon. Open a new journal entry. Type the subject of the journal - if it is associated with a project, indicate this. Then, select what you are tracking from the drop-down menu. You may then attach an item to the journal (whatever document or website you might be working on). Click "Start timer" to track just how much time you spent on that item.
If you want to automatically track all time you spend on documents, go to the options menu. Under journal options, you can select this feature.