NAnt scripts can get cluttered with configuration values. One way to clean this up is to create properties that are used throughout the script. Although, you could take this a step further and store NAnt script configuration values in an Xml file. I like this approach because it creates a clear separation between the script and modifiable parameters. For example lets say we have an Xml configuration file called Build.config that contains paths:

Our NAnt script could then load these paths into parameters in an "init" target. All other targets could then depend on this "init" target.