Still using panel-based media planning? Well, habits can be hard to break. But more importantly, they can also be very costly. With precise audience targeting now available, tools like Nielsen's @plan, comScore's Media Planner, and others no longer make (fiscal) sense. Some media agencies use panel-based planning to find the best sites to reach an advertiser's target audience. The planner inserts a desired audience characteristic -- let's say, females aged 18 to 34 with bachelor's degrees -- and gets a list of sites sorted in order of recommendation.