a logitech mx510/518 or nice razor mouse coupled with a good mousemat (got S&S steelpad myself) might help you out. try adjusting your mouse sensitivity between 6 and 8, see what fits your style of play best. turn up the brightness in the game and even on your monitor if needed. use net_graph 3 command in the console to check ping, loss, choke and fps and post what it says on the forum. oh, and you drink plenty of caffeine/sugar containing fluids (no, that does not include beer)