Well, first of all you need to get rid of that gin and get yourself a nice bottle of Ketel One
And as far as the vermouth goes I'll quote the bartender from my favorite martini bar in State College, PA (well the only martini bar there i guess):
Regular Martini: Toss in a few drops of vermouth
Dry Martini: Toss in a drop of vermouth
Extra Dry Martini: Toss a drop of vermouth up in the air in the general direction of the martini glass and if it goes in, so be it
In all seriousness I know you're talking about good old traditional martinis here but I could never get on board with gin. I like the smooth clean taste of cold vodka. And I've graduated from the above measurements and appreciate a little more vermouth character in my martinis now.
So my vodka martini recipe (dirty) goes like this:
7 parts Ketel One
1 part Noilly Prat dry vermouth
Splash of olive juice
All of the above into the sufficient ice and stir
Pour into chilled cocktail glass and add olives
As a nice change I enjoy olives hand stuffed with sun dried tomatoes.