Add quarter cup of yogurt. Don't add all of the yogurt yet; you still need room in the glass for the other ingredients. At this point you may add any other ingredients to the parfait. It is your choice; this is what makes a parfait so unique. You can add strawberry jam for some sweetness, cereal, oatmeal, granola, fruit, or whatever else you like. Be sure to leave some room in the cup for the final step.