Ramkitten's Packing-for-Backpacking Checklist

The Basics
Backpack
Optional: Hip-pouch
Pack cover
Tent
Optional: Tent "footprint"
Sleeping bag with stuff sack
Optional: Sleeping bag liner
Sleeping pad
Optional: Trekking pole/s

Cooking
Pot and lid
Optional: Small piece of 'scrubby'
Utensil/s
Stove
Windscreen
Fuel or fuel tablets
Lighter and/or matches

Water
Water bottle/s
Optional: Hydration system/water bag
Water purifier, iodine, or a filter-and-bottle-in-one
Optional: Nylon water tote

Clothing/Footwear
Nylon or Gor-tex shell/rain jacket
Fleece pullover
Non-cotton thermal top/s
Non-cotton thermal bottom/s
Non-cotton tee/s
Nylon shorts
Nylon pants and/or non-cotton tights
Optional: Convertible (zip-off) nylon shorts/pants
Non-cotton socks
Optional: Sock liners
Non-cotton underwear
Boots or sneakers
Camp shoes/sandals
Gloves or glove liners
Hat/cap
Gaiters

Tools/Accessories
Pocket knife or multi-tool
Duct tape
Flashlight and/or headlamp
Spare batteries
Map/s
Compass
Nylon cord
Bandana/s
Safety pins, nylon thread, needle
Optional: Sunglasses (with strap)
Optional: Cat hole trowel
Optional: GPS
Optional: Watch

Toilettries
Moleskin and Second Skin
Bandaids
Vaseline, small tube
Toothbrush and dental floss
Toothpaste, travel size
Mini-brush or comb
Aspirin and/or an anti-inflamatory (Ibuprofin, Alleve)
Baby wipes, travel pack or handi-wipes
Toilet paper
Girl "supplies" (if you're a girl)
Glasses/contact lenses
Sunscreen
Optional: Bug repellant
Optional: Hand sanitizer and/or a small bottle of peppermint soap
Optional: Small mirror

Miscellaneous
Food bag/sack
Zip-Loc baggies
Optional: Heavy-duty trash bag
Guidebook/s
ID, credit card, phone card, ATM card, travelers checks, cash, important addresses/phone numbers
Optional: Paper, pen/pencil
Optional: Pre-stamped envelopes
Optional: Camera