I make extra pancakes or waffles on the weekends when we have them and either refrigerate or freeze the extras. Usually fridge them, because I'll be planning to have them later in the week. Then I toast 'em to warm them up.
scrambled eggs really don't take long at all to do morning of, you could crack and beat the eggs ahead of time and keep them in a bowl in the fridge if you needed too.
Muffins can be baked the day before (I'll do them for snack and then leftovers for breakfast the next day).
Oatmeal is quick to do
Smoothie and Toast/Bagel/English muffin
cold cereal once a week on fridays
Or Tuesday because my son made a disaster in the playroom.
Yogurt and toast/bagel/English muffin