It is Sunna and highly encouraged to eat and drink something before the Fajr prayer in the last third of the night, a mini-meal named Suhoor (السحور).
Customs here merge with Sunna, and many people have different preferences over what they consume during the suhoor. More often than not, it might be leftovers of the Iftar meal.
However, setting up a small variety of traditional staples (and then some more non-traditional extras) to be on hand is, well, a handy arrangement to have for the family throughout the month.
You must have dried fruits and nuts. Dried apricots, figs, prunes, raisins, and of course dates (Sunna) are a must. Walnuts and almonds and whatever nuts you fancy. I put raw unsalted nuts, as the roasted salted variety would make us thirstier the next day during fasting.
Fresh fruit is excellent for Suhoor as well; whatever is seasonal.
Non-traditonal extras are whatever you/your family prefers. I put some packages maamoul, and a basket of chocolate goodies.
I would love to hear what you like to have for your Suhoor in the comments below!
صحة و عافية