NO PREP activity. Students interview each other in pairs about their daily routines, using both reflexive and non-reflexive verbs. Suggested questions are at the bottom of the worksheet. They fill in the grid, writing things that only pertain to themselves in the "Mi rutina diaria" box and things that only pertain to their partner in the "La rutina diaria de mi compañero" box. Things that they find in common are written in the "Nosotros" category.
With these activities, I generally have each pair report back to the class a few things that they found to have in common.
Vocabulary words align with Descubre 3 Lección 2.3: Reflexive verbs.
Additional resources for Descubre 3 can be found here