Who’s Calling?:

“Discernment has its own spiritual laws, and of course they have to be followed. If you want to call that a method, you can, but it’s not like what you’ve been calling methods. Those so-called methods are just gimmicks — not ways of discerning God’s will, but ways of avoiding discernment.”“

This is a good article with the exception of the deceitful heart/ sin for believers aspects. It discusses various ways to discernment.