I take it plain with just water. I typically have it M-F around 11:00 A.M (between breakfast and lunch) at work. Because of that, I don't put other stuff in it - otherwise I probably would.
1 1/2 cups, have a bananna, a few crusted walnuts and a few rasins.....mmmm mmmmm good! Two cups of black coffee and an hour later im in the head and "right as rain"!