for less than a week

headlamp,camelpack,extra water, and/or water purification, fruit, lots of trail mix, cans of tuna, salmon, spam, cans of fruit, multi-tool, razors, first aid kit, gatorade mix

aluminum foil (BEST CAMP SHIT EVER; when i travel i will make small fires on aluminum foil for no trace camping, cook anything in it, make grills with it, put coals in it and cover for a heater, package foods and supplies, lightweight, ect ect)

ziplockbags (a few sizes for all my items&trash), rainsuit, extra socks, a towel, mp3&solar kit (go together for me), mummy bag, tent, metal cup. flashlight, zippo/fluid, extra flints, flint, axe/shovel, half a fire log, lite fishing gear, rope, climbing gear (option), nightvision (option), map, compass, gps(option), 6mil plastic, pens, notepad, camera, extra clothes

EDIT: it all depends on the hike tho