"I love office supplies," Hewitt told PEOPLE at Tuesday's grand opening of Esprit's flagship store in New York. "I love being organized. It's the folders and the tech … [Staples] is a place to take me if you want me to get hot and bothered."
Not that Hewitt, who recently split with Ghost Whisperer costar Jamie Kennedy, isn't enjoying her current post-break-up life. "It's really nice," she said. "You definitely get more time with your girlfriends. You get more time to do things around your house. And just to relax and get your nails done and watch TV and have a good glass of wine. It's great."
But when romance does come back around, Hewitt, 31, has a formula for predicting whether it will last. "You can pretty much figure out on the first 10 dates who the guy is going to be seven months later," she explained. "And we as girls tend to romanticize men right away, and say, 'No, no, no, he didn’t mean that.' Or, 'That thing that he did, it kind of bothered me, but it will change.' "
[But] it doesn't change," Hewitt continued, laughing. "You have to find somebody just who works and gels with you and that's all you can do."
Hewitt has plenty of other dating advice, which serves up in her new book, The Day I Shot Cupid, out this week. Ex-boyfriend Kennedy also wrote a chapter – which Hewitt said she "loved," despite the fact that they're no longer an item.
"I thought it was great," she said. "And I'm really appreciative that he was a part of the book."