If you're crushing on a colleague, you're not alone: A CareerBuilder.com survey found that 40 percent of workers have dated someone on the job during their career, proving that it's a hookup hot spot, albeit one with parameters. Here, advice for turning a flirtation into a potential relationship.

Before making a move, it's a good idea to suss out whether your work crush has the hots for you too. Some tip-offs are "if he starts hanging around your work space a lot or asks you to grab lunch or after-work drinks," says Stephanie Losee, coauthor of "Office Mate."