First tip - while you’re planning your training.
Don't over think it! If it's your first half marathon, the best advice is enjoy it! Don't stress about food, or water or special runs at special paces, that's just unnecessary tweaking. The most important thing you need to practice is RUNNING! Slowly. Unless you're injured then don't run! Get out there and get those miles in the bag. Everything else just falls into place.
If it’s your first half marathon, don’t even think about time. Go at a pace which is comfortable and at which you can enjoy the atmosphere.