Mix the nuts, salt and water and leave overnight to soak.
In the morning, drain the water from the nuts. I don't rinse them - they are good with a hint of saltiness.
Spread the nuts on a cookie sheet.
Place in a warm oven - 170F for 12 - 24 hours - My oven only goes down to 170F but if I am using the dehydrator, I set it to 150F.
Stir occasionally (if you think about it) until the nuts are completely dry and crisp. Make sure to dry the nuts completely or they may mold if kept over 2 weeks.
Store in an airtight container.
Cashews take a bit more care because even if they are "raw", they have already been heated twice during processing. Do not soak cashews too long or dry them out too slowly - they develop a bad taste. For cashews, soak in salt water for 12 hours and dry in an oven set to 200F.