Lowering Your Lag

Of course, some users are stuck with a laggy display and have no plans (or cash) to upgrade to a speedier model. Fear not--you can still take steps to reduce the lag. Since all flat-screen displays have some lag, your goal should be to lower it to the point where you cease to notice it.

First, check to see whether your TV has a Game mode--basically, a display mode that turns off postprocessing routines at the cost of a slight reduction in image quality. You might have to muck around in the manual to figure out exactly what it does--some manufacturers incorporate an Overdrive mode that may actually increase input lag.
http://www.techhive.com/article/1839...r_monitor.html