The new frontier is certainly digital and social. Here is a great article about profiles and your resume, especially focused on LinkedIn.
Indeed, your online presence–particularly at LinkedIn, but with some Twitter and Pinterest possibilities–can become a subtle way to intrigue recruiters without giving anything away at your current job and, in fact, without you doing much at all.
With LinkedIn, aside from keeping your profile up-to-date and listing specific skills people might search for, Ide says that you should go to your settings and indicate–in the “Communications” section–that you’re open to hearing about career opportunities. That's a tip-off to recruiters that you’d be okay with being contacted, but it doesn’t flag anything obvious to anyone you currently work with.
Next? Put things on your LinkedIn profile that can start conversations. Maybe it’s news about a charity you support, or even your favorite sports team, but just as wearing a Red Sox T-shirt in a bar would give someone an opening to talk with you, so can the logo on your LinkedIn profile. “Recruiters want their efforts to be high yield,” says Ide. “If there are seven people who are technically qualified for the job, the person who looks approachable is the one they’re going to reach out to.” In a bar, you speak to the person who’s smiling, not scowling.