I think the most critical thing to understand is that this is the holiest time for Muslims in the world. That means that around 20% of the worlds population is participating in this event - self reflecting, praying, waking up early and they do so to varying degrees. As a human being all this collective activity is an incredible phenomena to think about.
Suhoor is the meal you eat before the sun comes up. My wife and I ate the following two days ago: toasted gluten free bread with butter, backyard fresh tomatoes, sliced avocado, a pinch of farmers market fresh arugula, with some medjool dates on the side.