I backpack throughout the Canadian Rockies most weekends, and have been forced to learn to pack light in order to continue this hobby. I've done all the "easy" hikes in the area, where a pack heavier than 30lbs is acceptable. Nowadays, I'm moving on to more technical hikes and scrambles up unmarked sections of mountain. I pack as minimal as possible in order to do this successfully.
Typically my pack will contain a change of clothes, my food / water, a small LPG stove nested in a cook pot, a sleeping bag, and a tarp. Occasionally I will also pack a small tent, mainly for snowy conditions.
On my person I also have the bare essentials. Some water purification tabs, a bandanna, firesteel, tinder, matches, and of course a knife.
Minimalism is the way to go when camping. It forces you to use your skills and your surroundings more than your gear, which in turn makes the experience that much more enjoyable. Yes, I know saying that is hypocritical considering I carry a stove, but the fact of the matter is I'm hiking more than camping, and on the trail I usually want hot food. It takes too long to get a fire going every time I'm hungry or want some hot chocolate.
Oh, there's another benefit to packing so light. You can afford to carry some "luxury" items. In my case, I pack something you'll never see another ultra-light hiker with. A 20" pack axe. Yeah, its big, heavy, and a pain in the ass to climb up a mountain with, but it'll be worth it. Once you arrive at that gorgeous unnamed sub alpine lake at the top of a mountain, you'll want a big fire that's going to last. Collecting sticks just doesn't do it. The axe has also saved my ass when I've been caught in mountain snow and hail storms. Fire wouldn't have been possible without it.
Soo... uh, that got long. Moral of the story? Just pack the stuff you really need, and use it to its full potential.