Also, direct your air vent wide open on the offending party's head. Ipod foot tapping to the music on their seat support. Reporting your suspicions of possible drug smuggling to Customs officials. (I have never done this but I imagine you probably shouldn't use this one too often)

The best thing is to not fly in coach. People in J and F tend to be more considerate. Not a hard fast rule, there are alway exceptions.