Rule of thumb for preterite past tense (regulars)

Use quizlet: http://quizlet.com/32347411/rule-of-thumb-spanish-preterite-tense-regular-ar-verbs-flash-cards/http://quizlet.com/32348383/rule-of-thumb-spanish-preterite-regular-er-and-ir-verbs-flash-cards/
Form of preterite:I spoke                                  I ate                                      I livedHablé                                     comí                                       viví      aste                                    iste                            iste      ó                                        ió                                      ió      amos                                    imos                                    imos      asteis                                   isteis                                   isteis      aron                                     ieron                                   ieron