Employers look for self-starters, so it's important to stay active by participating in industry events and associations, taking continuing education workshops or courses to stay current and develop new skills, blogging, consulting, or even skill-based volunteering at a local organization (check VolunteerMatch, Points of Light's HandsOn Network, Idealist, and AARP.) You'll find free classes online for various skills, particularly in technology. Staying busy is a good way to impress people who may be in a position to hire or recommend you, and it demonstrates that you're willing to learn new things.
Career expert Kerry Hannon says, "I always tell people, 'Get out of your head and get into the world.' People often sit in front of the computer to redo their resume and blindly send it out for jobs. If you can get out and start skill-based volunteering (not just stuffing envelopes), you never know who you'll meet."