How can I prevent one or more bones from being added to the key frame? Is there a method to prevent keyframing a bone even if it's selected? It would really help to prevent mistakes or to just remember what bones should be included in an action.
What I can think of is locking the properties that you want to not change: Loc, Rot, Scale. You can see there are padlock icons for that. But I'm not sure if I understand your problem correctly.