Baby with bad cold - any advice?

My 15 month old has a terrible cold, we have tried everything...humidifier, saline nasal drops, nasal suction, going into the bathroom with the steam from the shower running, tylenol (he has a slight fever), holding him upright...he's still so congested. Any suggestions? How often can you do the saline drops? Is a warm or cold mist humidifier better (and why)? Any help you could offer would be great!