LifeLock offers new customers a 30-day trial of its LifeLock Ultimate service for free via this link. Plus, if you decide to continue your membership, you'll receive 15% off the monthly or yearly rates for six months, putting monthly rates at $21.25 or yearly rates at $233.75, respectively. (The discount should apply automatically. If not, use coupon code "CJ15S30".) That's tied with our December mention as the best offer we've ever seen from LifeLock, which provides credit monitoring and identity theft prevention services.