You should always prepare your hair for cornrows/weave prior to executing the style. Wash your hair as you normally do, and give it a good conditioning treatment as well. Make sure that your hair is totally dry before starting the cornrow process. To create the base to sew your weave onto, you have to braid your head in a series of cornrows. To do this, you'll need a wide tooth comb, a fine tooth comb, and a hair pick. You will also need 2 to 3 large hair clips to hold your hair away from your face, and a detangling spray of some sort (3 parts water mixed with 1 part oil in a spray bottle works well). When you add your weave, you'll place it in layers around a part in your natural hair. Your part is the exposed area of the scalp, and is typically located down the center of your head or slightly off-center. Choose the location of the part carefully because you will not be able to change it until you take out the weave. Separate out 0.5in (1.3cm) sections of hair on either side of it. Pin the rest of your hair back using the clips. Your part only needs to go about halfway back on your head. Each of the braids you began on either side of your part will continue on to form full braids that wrap around your head. This means that from a birds-eye-view of your completed head, there will be concentric circles formed around your part. Follow the pattern of the perimeter braid, by sectioning off thin pieces of hair around the outer edge and working in. Go to the next braid closest to your hairline, and braid on either side of your part towards the back of your head. Continue spraying your hair with the oil/water mixture or your detangler spray to make braiding easier. Your braids should be very tight and may hurt while braiding, but shouldn't be painful when completed. The braids will likely become quite thick about halfway through, because of all the hair you gather. Don't be worried if because of this your braids are uneven. Work inwards on your braids, away from your part. Each of the small braids you started on either side of your part should serve as the start for each new braid. If you run out of part-braids though, you can create more near the part on the back of your head. Tie off all the ends and tuck them into/under the finished braids so as to hide the tails.
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One-sentence summary -- Wash and condition your hair. Gather the necessary supplies. Select your part. Begin the center braids. Finish your braids.

The first thing that you'll need in order to survive in the woods is water that you can drink. Look for signs of fresh water nearby like areas of green foliage that indicate water is nearby, low-lying areas where water could be collected, and signs of wildlife like animal tracks. It could mean that a creek, stream, or pond is nearby. While finding water is important for survival, be aware some water sources will not be safe - if possible treat all drinking water before using it. If there are mountains nearby, look for water collected at the foot of the cliffs. The presence of insects like mosquitoes and flies means that water is nearby. Water from heavily oxygenated water (such as from a big waterfall or rapids) typically is safer than that from a slow or still water source. Freshwater springs are typically safer water sources, although these can be contaminated by mineral or bacteria as well. Remember that all untreated water must be considered risky unless treated. Even crystal clear water can harbor diseases and be dangerous if consumed. Rainwater is one of the easiest and safest ways to hydrate yourself in the woods. If it starts to rain, place any containers that you have out in the rain to collect it. If you have a tarp or a poncho, hang it at least 34 feet (0.911.22m) off of the ground by tying the corners to trees, and place a small rock in the center to create a depression that will collect the water. Don't let the water sit in a container or a tarp for too long or it can stagnate and bacteria can contaminate it. If possible, purify any water that you collect. Use a rag, cloth, shirt, sock, or any other item of clothing that's made out of absorbent material like cotton to capture morning dew. Find a clearing or a meadow with tall grasses and place the cloth on top of the grass to pick up the dew. Move the cloth around in the grass until it's saturated, then wring out the water, collecting it in a container. You can collect the most dew just before sunrise. Be careful not to collect dew from poisonous plants. Grasses are your safest bet. You may be able to find fresh water simply by digging a hole deep enough to reach the water table or the level at which the ground is saturated with water. Use a shovel or a sturdy stick to dig down until you reach water. Make the hole wide enough so you can easily scoop water from the hole. Wait until the mud settles down at the bottom of the hole and the water clears before you scoop it out. If you find ice or snow on the ground in the woods, collect it so you can melt it down for fresh drinking water. You can place the ice or snow in a container and place it next to a fire to melt it or you can hold the container to use your body heat to melt it. Melting snow is an inefficient way to obtain water. Although it is a relatively safe and easily identifiable source of water, it is not a lot of water by volume. Melting a pot of snow will yield only about a third of a pot of water. A lot of fuel and effort may be wasted if there is a better source available. Collect snow or ice that has a bluish tint to it. Frozen water that is gray or opaque will have a high concentration of salt, which can dehydrate you even more if you drink it. any water that you find. It's extremely important that you purify any water that you collect, including rainwater, dew, and ice or snow, so you don't consume bacteria that could make you ill or even kill you. Use a piece of cloth or clothing to strain the water to remove large particles, then boil the water for 10 minutes to kill any contaminants. If you don't have a container to boil water in, you can fill a clear plastic bottle with water, seal the lid, and place the bottle on its side in direct sunlight for 6 hours to purify it. In the event that you have no containers and no way to purify water, you can dig a deep hole, let it fill with groundwater, and wait for the particles to settle at the bottom and the water is clear before you drink it. You should only do this if you have no other option.
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One-sentence summary --
Search for a source of fresh water. Collect rainwater to drink. Absorb morning dew with a piece of cloth. Dig a hole to find fresh water. Melt snow or ice if you can find some. Purify