Describe the footwear on your right foot at this moment. Describe the weather where you are at this moment. Give the title of the book you are reading today. Give us the history of a single scar on your body. A journal is not the same as a diary.
Diary entries tend to be fairly impartial chronological lists.
Therefore a diary entry can inspire a journal entry, but journal entries should be observations, conclusions and opinions drawn from daily experiences. In your diary say that you were late for work because all traffic came to a halt for some ducks crossing the road. In your journal muse about silly ducks in the spring, and why they don't just fly across the darn road.