Get clipless shoes&pedals, or at least toe clips. Then when you get to the hill, stand up and HAMMER. Select a larger gear than you coud handle sitting down, 'cos standing up, you'll prefer a low cadence and have lots of power. It's best if you have an old roadbike with downtube shifters. Then you have no chioce but keep on hammering to the top You know you want to push yourself