Prayers should be the key in the morning and the lock at night. (or like my dear Mother-In-Law, Lilyan used to say: Tell God 'Good morning, Lord. Please be with me today.' & before you go to bed, tell Him,
15 Talks All LDS Teens Need to Hear. This would be such a good activity - have the yw each choose a talk and report on it to the rest of the yw. Any time you can get them to talk in front of each other is a good thing!