I picked up an idea mentioned by one participant at the recent Latin workshop at Dickinson college, namely the use of dice to drill forms.
With this page, titled ALEAE IACTAE ESTOTE!, students cut out one die for person and number (1st Sg. through 3rd Pl.) and one die for each tense (Pres., Imp., Fut, Pf. Plupf., & Fut. Pf.).