1 Shoulder Straps: Pull down and back on the ends of your shoulder straps. 2  Adjust the straps so that your backpack is flush against your back. 3  Hip Belt: Buckle and tighten the hip belt on or just above your hip bones. 4  Notice your pack's weight transfer onto your hips.se them to fill out your pack and to give it structure. Pack heavy items like shoes, a laptop, or a camera in the middle of your backpack. Keep them as close to your body as possible. Pack lightweight items like t-shirts and socks at the bottom of your backpack.