Over the past few years I've slowly gone from completely skipping breakfast, to granola bars and donuts, to gradually eating what I consider a healthy breakfast.
All of these ingredients can be purchased in bulk, and I spend less than 5 minutes a day preparing my breakfast.
Water (2 cups) - I drink this first thing when I wake up
I microwave a bowl of water (1 cup) until it boils, then add:
Whole Grain Rolled Oats (1/3 cup)
Wheat Germ (2 tbsp)
Whole Ground Flaxseed (2 tbsp)
Oat Bran (2 tbsp)
Walnuts (1/4 cup)
Almonds (1/4 cup)
Raisins (1/4 cup)
Blueberries (1/4 cup)
I mix everything together, then let it sit for about 10 minutes while I go take a shower.
With my oatmeal mix I also take:
Orange Juice (1 cup not from concentrate)
Vitamin D3 (2000 IU)
Niacin (500mg)
Fish Oil (2 x 900mg of Omega-3) - enteric coated
Each of the ingredients provides important nutrients, based on various web articles I've read online; but do your own research.