Beat, don’t meet. If your result only equals a challenge threshold, it fails. If the threshold is 3, you need a 4 or higher to succeed!
Challenge math. An average challenge (3) means an average person, rolling a d6, has a 50% chance to succeed. Heroes are not average people, though, and you should expect to face worthy (5) challenges on your adventures. Even nigh-impossible (9) challenges are possible to achieve if heroes invoke their ideals!
Keep it real. The Guide can inflict a -2 or worse penalty on actions if they don’t seem to make physical or logical sense—for example, if you Deceive someone by telling them something they just witnessed was just their imagination.