"Companies will say, 'Here is your space' ... do whatever you want with it," Shapiro said. "It's kind of an unconscious test of loyalty and values, because if you fill it with troll dolls or crystals or religious things, it's gonna make them feel really, really uncomfortable."
And don't go crazy with family photos.
"It's telling the employer that this person would rather be at home with their kids," Shapiro said. "One professional shot, and that's it.