First of all any movie by Nancy Meyers is going to look fantastic.
The set designer is Jon Hutman. He also worked on It's Complicated.
I love all the warm tones, you can tell you're in California. Every piece of furniture seems worn in too, like it's really someone's house.
You should also check out Laws of Attraction, I love Julianne Moore's apartment in that movie. I can't find a decent picture though. :(
Are there any movies you can think of that inspire you to decorate?