To plume up my will in double knavery

Here is the correct way to make a martini:

Fill a metal tumbler with ice.
Add a capful of vermouth and shake the crap out of it
Pause for a couple of minutes to allow a small amount of icemelt -- you want a bit of interaction between the vermouth and the icemelt.
Put a lid on the tumbler and strain out the vermouth -- pour the excess vermouth right down the drain.
Add 2 shots of gin (for a proper martini) or vodka (if you're a communist).
Once again, ...