This is the big-picture approach to home energy monitoring. It can get pricey, but can also save the most energy. Systems like Agilewaves and smart home appliances work in conjunction to give you a thorough and interactive look at your home's energy use. Smaller-scale (and less expensive) versions include Smartlinc or HomeManageables, which allow you to automate your home's devices so you can monitor and control energy use remotely. However, going whole hog with smart home appliances, metering and software is something to consider for some serious energy efficiency. Eventually, we'll all be connected to a smart grid that does this for us, but we're still a few years off. So for now, it's up to you if you want to smarten up your home.