Usually what I do after I take a huge rip off of my pipe is I just take a huge hit, and then take a small sip of ice-water directly afterwords, while the smoke is in my lungs still. Then I hold it in for a while, continually sipping water if need-be, then I exhale and sip another sip of water. This helps a lot.

Also, something that is fun to do after you got done smoking and you have that "smoker's voice", I usually eat some ice cream. Not only does it feel cool as hell and taste great, but it helps soothe my throat too.