The "what I did this summer" journal activity is a tried and true staple of language learning classes. Keep it interesting by sending your students on a scavenger hunt. Challenge them to create short stories in Spanish--or longer tales, if their abilities allow--describing at least six out of the ten listed events or scenes, drawing on the experiences of the holiday for inspiration. You can substitute other options according to class or cultural themes, or give students the option to create their own list of scenes to "hunt":
Describe how you felt
Describe the scene at the dinner table
Describe the process of preparing dinner or for company
Translate a joke someone told
Describe the loudest/busiest moment of the holiday
Describe the quietest/calmest moment of the holiday
Explain games played
Describe the people that attended
Describe the weather outside during the holiday
Describe the food eaten