I've found it better to LaTeX my lecture notes than handwrite them. This makes it easier to change things for the future. I made a .sty file to help make them easier to write, and I added a bunch of stuff along the way.
Here are some of the highlights:
Visit the GitHub Repository for all the files and version-control goodness, or download them individually:
Here are some of the lecture notes files I've created with this. (Some of them don't use all of the functionality of package as I created them before adding the functionality. Also, many of them are incomplete as I don't always have time to spell everything out before I teach it the first time.)