Slic3r has a much simpler approach when changing resolution settings. Unlike Skeinforge, Slic3r requires the user to input the printer's nozzle size. Along with a preference setting for layer height, Slic3r automatically adjusts the slicer for different resolutions.
The Thingiverse website is a file-sharing site of user-created digital designs. It has many small models that can be used to make quick and efficient print tests. We'll use the one that's designed for surface calibration. It's a good shape for testing resolutions and small enough to print quickly, without much filament waste. It can be downloaded at www.thingiverse.com/thing:39050.