I just bag some goodies in the morning before heading out. Landjaeger is pretty key. So is jerky. Trail mix with lots of nuts (no peanuts) and raisins. Slices of apple. Carrots and celery sticks. Cheese cubes. Maybe a hard-boiled egg. And I normally make a drink, two tea bags, the puree of a peach, a half-liter of water, and a few slices of lemon. Bring everything to a boil the night before, leave it to cool. In the morning, strain it into a water container of choice - naturally sweetened with just a bit of caffeine. Good follow-up to the black double-strong I use to get me going.