Be a Hero
In order to get your significant other in the right state of mind, before they arrive home from work for the day (you did take the week off, didn't you?), "Be a Hero". When you hear the car pulling up in the driveway or into the garage, save your game (quickly!), turn off the TV and Xbox, and start cleaning the house! Yeah, I know that sounds crazy, but just listen to me! You know you're going to get the question, "What have you been doing all day?" This way, you can nonchalantly say you were just picking things up, and that you "played a game or two." Works like a charm, every single time right? WRONG.
WARNING: This can lead to the expectation of doing housework on a regular basis. You may only want to employ this technique if you're already whipped and have the nickname Mr. Mom. For others, the Xbox 360 launch may warrant this risk. Faux house cleaning is a very powerful yet dangerous technique and should be used only by professionals.

Guys, if you're girl looks like this, no amount of
real or fake house cleaning will get you closer to 360 gaming.
#1 Lesson in Life is Flowers and Gifts
Gentlemen, to augment this strategy, make sure and buy some flowers for her the first day of the 360 launch Do it up proper with a nice colorful, aromatic arrangement. If you're feeling it, buy some roses. Sprinkle your arrangement with a few compliments and your chances for some uninterrupted game play have improved by at least 35-47%. Also, gifting isn't out of the question, especially if you can find a reasonable spa package. That's a good 2-4 hours of quality gaming.
Promise or Deliver on a Future Plan of Action (FPOA)
FPOA means you commit to planning a future event, in order to keep your mate out of your hair right now. This is great for last second Xbox Launch planners. For example, try this:
"Next week we are going to have so much fun tomorrow at the Apple Orchard, aren't we sweetie pie? Remember? That special, romantic event I planned for us? Oh yeah, but that silly new game console comes out tomorrow, so I have to check that out, but next week! Oh, next week at the orchard!"
Remember - just drop hints and lay out your plan. Don't dwell on the awesome new games you are going to be playing or the sheer number of hours you'll be playing them. It's kind of like subliminal advertising. The next thing you know, she'll be nodding her head and daydreaming about that Apple Orchard date you've planned. It's worth the sacrifice.
Now, If you are a really lazy dude, just go ahead and only promise a FPOA. In other words lie. This will give you optimal return on investment, but carries a high level of risk. In fact, this can lead to divorce, fights, crying, and headaches! The Xbox 360 may constitute an emergency – but use your best judgment soldier.