Keep Eating and Drinking
It's essential to keep eating throughout the ride, not just when you feel like you need a boost. Have a little snack every 30 minutes or so. If you don't want to go out and spend a fortune on the best energy products, a banana or a handful of nuts are great and will give you the calories you need. Hydration is huge, too. Your performance will drop off quickly if you're not hydrated. Drink water the night before, too. That will impact how you ride.