As I mentioned in my first post about power meters, training with power in cycling can be fairly complex, and the very first step is the easiest of all: collect data. Begin your first few weeks of training by simply riding with your power meter and collecting data.
Some cycling power meters come with their own software suite for collecting and analyzing data, such as PowerTap's PowerAgent, and there are some freeware programs out there you can use, as well (e.g. Golden Cheetah). Training Peaks is an online software suite that offers free and premium accounts, and they even have an offline version called WKO+. Regardless which product you use, it’s important you collect data from every ride. More on that later.