Engaging in activities that are new, difficult and complex forces your brain to lay down new cellular connections, Nussbaum said. Exercise and healthy diet are also important to brain health. Emerging research in meditation and spirituality has indicated that mindfulness -- practices associated with being in the present moment -- help, too.

"We tend to really get so impressed with the latest gadget, the latest phone, the latest whatever it is," Nussbaum said, "and we forget that all of the technology that built it came from the human brain."

What is there left to remember that's not out there on the Internet? You'd better know your most valuable digital secrets by heart: Your passwords!

Share your thoughts about how digital technology helps or hurts your memory in the comments.