At most you can only live for a week with out water, as compared to a
month without food. So in a bushcraft or survival setting, water should
be the first thing think about obtaining.
The Solar Still
A solar still is a great way to obtain drinkable water when you think you there is none. The apparatus shown in this image uses solar energy to evaporate contaminated water (un consumable moisture) and recondense it into pure drinkable H2o.
Collecting Dew and Light Rain
Mop up dew or light rain with an absorbent cloth. Micro fiber cloth work
great, but any cloth will do. Wring the water out into a collecting container.
-Look for birds that eat insects, they fly to and from water in the mornings
-Look for animal trails. Domestic and wild animals will forge trails too
and from water sources.
-Listen for frogs and crickets, both will be located near a water source.
Look for foliage to tell you where water is
Look for dense foliage as trees and plants will grow thickest and greenest
around sources of water.
There are many more, those are just a few ways to find water in the wilderness and while bushcrafting.