Many backpackers learn how to pack a backpack by trial and error. Some backpackers even spend months learning from their mistakes. A common problem is packing far too much. Experienced backpackers know how to pack right and how to avoid the discomfort of aching shoulders and back pain.
Make a selective packing list. The number one rule to packing a backpack, regardless of trip length, is to minimize your packing list. Trim to the bare essentials. If you are unsure about whether an item is necessary, chances are you can do without it. Also, look at the amenities available at your destination and pack accordingly. For instance, if you're heading to a low-cost food haven, you may want to leave your portable kitchen off the list.
Pack your heavy items. These may include stoves, crockery, fuel, water bottles and even laptops. Place the heaviest items closest to your back for when the backpack is worn. Keeping these items at the bottom or top of your pack will make it top-heavy, throwing off your balance, while keeping them at the bottom of your pack is more likely to cause back pain. Lay your top-loading backpack down, straps facing the floor, and load your heavy items into the main middle section so that they are nearest to your back when you wear the pack.
Pack your clothes. While fewer is better for all packed items, keep in mind how often you will have the access or the time to do laundry (or how long you can suffer in smelly clothes). Generally, a week's worth of clothing suffices for any trip length. Pack the clothes toward the bottom and center of your pack, using socks and scarves to fill empty spaces surrounding your heavier items. Place lighter items (such as clothing) farthest away from your back when the pack is worn.
Pack your sleeping gear. While most hostels and budget hotels supply bedding, some do not provide clean sheets. Unless you plan to do a good amount of wilderness camping, you do not need a sleeping bag and tent. A clean sheet, sleeping bag liner or "sleepsheet" (bedsheet folded in half and sewn up one side) will do the trick. Place your sleeping gear compactly within the separated bottom section that comes with most backpacks.
Pack your smaller miscellaneous items. Place items (such as travel documents, water gear, maps, sunscreen, snacks, books or toiletries) that may require easy access in the backpack's top flap and/or its side pockets.
Adjust your pack. When you are wearing the pack, most of its weight should rest on your hips so that your legs are doing the work rather than your shoulders or back. Buckle and tighten the belt strap and shoulder straps accordingly. You may also need to adjust the straps on the top flap and bottom section to ensure the bag stays upright against your back.
