Did you know that there is an easy-to-use tool available to you right now that lets you create custom light curves from AAVSO data and helps you to analyze that data in multiple ways? Well there is, and its called VStar. To get it, simply click the "Data" tab at the top of this page, then under "Analysis" on the dropdown menu you will find VStar as one of the choices. From this page you can get the download (no installation required) and read a bit more about how it works and what resources are available to you.
You can also view the PowerPoint presentation I gave at this year's Annual meeting. This will give you a better feel for what VStar can do. Check it out. It's fun!