Dear Lee , I don`t want to sound facetious but, quit smoking is the first thing that comes to mind.
I think you have spent a quite few years dodging the bullet, you are concerned enough to log in to this forum , be concerned enought to quit.
Maybe you already have, if that`s the case , congratulations!
Marica

Caregiver to husband Pete, Dx 4/03 SCC Base of Tongue Stage IV. Chemo /Rad no surgery. Treatment finished 8/03. Doing great!