I have a tip that may be considered turpis... but is useful nonetheless. Print out two sets of A4 sheets with grammar rules, conjugations, declensions, numerals, ordinals, pronouns, and the like. Take them to a copy store and get them laminated. Carry one set around with you to school and use them as a reference whenever you study. Leave the other set in a basket in your bathroom to browse when you are seated on the throne.
I guarantee you that you will remember everything on the sheets by the time the trials come, without contracting an alien mutation of polio, if you do that - plus make sure you lava your manus and don't mix the two sets of sheets up.