Hi AlannahBottino,
If you want to create a grammar reference booklet that would be a good idea, just don't spend too much time on it. I personally didn't do this since my teacher provided my class with a grammar booklet with the all of the tenses.
You should include all the tenses and moods as specified in the Italian study design (towards the front of the study design) and make sure you work on being able to achieve all of the grammar points accurately (gender and number agreement etc) as very often in the examinar's report for the Written Exam, they emphasise that they higher scoring students used more complex grammar structures. Using more complex grammar structures will obviously help to raise your mark if used appropriately/correctly.
Just set it up in a simple/logical way that makes sense to you!
Hope this helps!