Checking Your Path
Have your two rocks, same size, one white, on black. The black is 'no' the white is 'yes'. When you want to know if you should go with a particular plan of action, out hand over bag (with stones in it) and say:
Spirit of knowledge
Guide my hand to the correct answer.
Should I do the working of (say what you plan to do) or not?
Then check your answer. If it's black don't think "Oh I'll try again". Just don't do it.