I sometimes have so much bottled up inside of me and so many simultaneous trains of thoughts that I have no idea where to begin when I want to journal.
I recently found a good website for inspiration. There are good suggestions here whether you journal in the traditional manner, or you journal for scrapbooking. http://debbiehodge.com/2012/03/keep-a-5-year-journal-progress-to-date-and-prompts-for-april/
There are suggestions here for 365 days of the year.