You need to blindfold yourself and walk into the woods.
Listen to mother earth and she will guide you to the perfect tree.
Be patient, mother earth always takes her time, but she always gets it right.
Once the spirits tell you its time, take the blindfold off and harvest the tree.
Look at the fallen tree, admire the rings, because each ring is a mark for each wisdom-gaining year the tree spent attached to mother earth.
After you have seen what the tree has gone through in it's life, you must wait until the moon is at its largest.  On that night, plane the tree down, and let the grain tell you where it wants to be cut.
By sunrise you will be free to walk out of the woods, with the perfect bow.