Step Nine is no different than the other steps, and it reminds you once again, that you cannot overcome personal difficulty alone.  You have prayer as your constant companion to get you through.  You pray for the willingness to be willing, whenever you find yourself not willing to take the next right action.  If you have people on your list where there has been, or still is, mutual harm being done, you may have difficulty with this step.  There may be people on your list for whom you do not feel it necessary to make amends.  You may simply not want to.