If the old "coffee and a donut" thing is too time consuming, here's a quicker option: Hostess is now selling caffeinated donuts.
They're called "Boost Jumbo Donettes," and each one has the same amount of caffeine as a cup of coffee. They've got two flavors right now, Chocolate Mocha and Caramel Macchiato.
They did a limited release last fall, but they'll be available at convenience stores nationwide starting this month.