Also check out some of the other E128 Engineering projects here: http://www.youtube.com/results?searc...rch_type=&aq=f
Good old salt with lukewarm water works very well, and so does any medicated gargle. I prefer Chlorahexadine at 0.10% concentrates.
If you cough a lot at night, take a medicated lozenges and put it under yr tongue or at the side of yr mouth. The slow dissovle action will help sooth the throat, often allowing better sleep.