"Your bed is for sleep and sex," Conrad, 28, tells Allure in its April cover story.
The former reality star turned style guru reveals the secret to her laid-back California vibe – keep it casual.
"Take any trend you want and relax it," she says. "That's how California does it. If it's silk button-up shirts that are in, you probably don't button them all the way, and you cuff a sleeve, you know what I mean?"
She adds, "It's almost like how your outfit looks at the end of the day."
Alexi Lubomirski for Allure
"If it was up to me, my home would just be over-the-top girlie and vintage but I share my home with a gentleman now," she says.
Yet, Conrad is plenty girlie when it comes to her hair.
"I can't remember the last time I didn't have extensions. Extensions are great. And they've come so far in the last few years," the bride-to-be says.
The April issue of Allure is on newsstands Monday.