Dew
Catch the early morning dew buy swiping cloth over a field of grass at first light. Then wring out the water.
Solar Still
Solar still
Here's how you make a solar still to capture water in the soil. You'll need a receptacle, some clear plastic and something to with which to dig.
Water from transpiration
Plant water
You can also capture the water released naturally by plants in the process of transpiration. Tie a transparent plastic bag around the outside of vegetation, making sure the leaves don't touch the edges. Water will collect in the bottom of the bag.
Salt water
Convert salt water to fresh by boiling it and collecting the steam in cloth and wringing it out.