well if you want to be like les Stroud some cameras a musical instrument and a hotel to sneak back to at night

If I KNEW I was going to be lost for a week: food for a week, a bottle of Jack Daniels, & the prettiest girl I could convince to come with me.
Seriously. I ALWAYS carry a knife. My "survival" kit includes: a basic first aid kit, matches and a butane lighter in a waterproof container, a couple of fish hooks & line in a film canister, water purification tablets, sunscrean & insect repellant with DEET. I usually carry a leatherman multitool, extra shirt & a compass. The rest depends on the location, terrain, weather, & your situation. I'm in Florida so I only need minimal protection from cold--other places are different.

BlackWater
Good grief Man, you forgot the kitchen sink!

Two items, a poncho and a device I carry all the time called “SPOT” (findmespot.com)

The poncho is to keep you dry and warm for a very short period of time while you wait for the Calvary to come swooping in after pushing the 911 on your “SPOT” !

well for one thing I would not go into the woods to plan on getting lost. on the other hand people do that all the time. So for one thing I would have a GPS, extra batteries, flashlight, extra batteries, lighters/matches,flint(FIRE), book bag of trail mix, in a couple sealable bags so odor doesnt attrack bears, I would take a hand gun, poncho, space blanket, and firstaid kit. and just for kicks and giggles the kitchen sink...

Plan not to get lost.

A double sized sleeping bag, Ann Margret, some food and a GPS Find me device for in the morning.

If you think you're that you are going to get lost, perhaps you should wait until you memorize the terain by studying maps, Topo Maps and learning about the area you'll be in. TV makes it look fun, but it's not. It's actually very scarry and you will be hurt!
It take one mistake to get you killed and getting lost is your first mistake.
My wife tells me to stay home when she has a bad feeling, I listen to her just as I listen to myself. If you're not sure don't do it. I made that mistake one and am still paying for it and I will until the day I die.
Carry knowledge!
A good Knife, Compass, a canteen (metal prefered, matches, and wear layers. Taking electronics will only keep you going for a day or two until you run out of water, die and end up food for the rats.

compass
good knife
flint to start a fire
a lighter
tent
blanket
tape
rope
toilet paper
paper to start a fire

I'd bring waterproof matches, knifes, a whistle, some sort of power bar snakcks or meat for energy, a gun and pleny of ammo. Some fishing line and hooks, a water container to boil in. And a water bottle. Just make sure you boil your water before drinking...you'll risk getting that sickness from wild animal pee

I would take:
-a flint stick
-a knife
-some food (such as energy bars)
-a canteen full of water
-a map
-a compass
-a first-aid kit and more
(but travel light)

Bring a GPS with a compass and map as back up, learn how to use each either by book or even better by attending a local navigational course that way you won't become lost to begin with.

Many think getting lost is fun,that it allows you to exsperience an adventure.But there is a reason many Native American tribes believed the ultimate punishment was banning someone from the tribe.It's because the chances of surviving on your own are almost zero....and that by someone who grew up surviveing in the woods.

As far as camping/hiking for a week....

water purification filter or tablets, I like the small ones which have a ceramic filter.Being able to have access to water is first priority, you can survive a week without food pretty easy but not without good clean water.
Light dehydrated meals. One of the first mistakes I made years ago at age 15 on my first hiking trip by myself was to bring cans of soups, vienna sausage etc. My backpack weighed around 70 lbs...almost as much as me! I ended up dumping 1/2 of it just a few miles up the trail.You want to be comfortable and have fun not be a pack mule for a week.

flashlight, get the kind with LED's which make the batteries last much longer than a regular bulb and they are more dependable.

two bic lighters and one flint and steel...wear the flint and steel around your neck so you don't lose it.

sturdy knife, you don't need a machete, you need a small easy to handle knife so you don't slice your hand open trying to peel a potato with a machete. Then you need a small hand hatchet for chopping wood or even better get a good wire saw with hand holds. Don't waste your money on the four dollar specials they put in cheapo survival kit...get the $25 one, it's worth it.

fire starters...the kind you can break off which are made of wood chips and parrafin...or you can make your own. Take cotton balls and soak them overnight in vaseline then store them in a waterproof/airtight container such as a baby food jar.

Tent, if your not in mosquito country a tarp is just fine..if not you really will enjoy a real tent with mosquito netting more.

sleeping bag if the night temps are anything below 65F, get one that is has AT LEAST A RATING 15F below what you think night temps will get down to.

foam sleeping pad...it's romantic sounding to sleep in the open on the open ground but the reality is that dang rock poking you in your lower back in the middle of the night you didn't know was there. A foam pad weighs almost nothing but feels so much better.

A good book...preferably one that will enhance your exsperience such as bird identify, edible wild plants, camping skills etc.The great out doors has some nice scenery but as you lay there in the eventing waiting on it to get late enough to go to bed and your hearing every rustle every bush makes a book helps pass the time.