Issues will sometime arise when UV mapping a model before texturing. Ever model, even the most basic ones will have unique challenges in the UV stage. In the recent releases, the Autodesk team have made leaps and bounds in the area of UV Mapping workflows in Maya.
Here, The Render Blog posts an excerpt from the Advanced Shading Techniques course. This look at UV Mapping shows how to simplify the UV Mapping process, and walks through some of the issues that may arise when doing some uv mapping. It is good to keep in mind that the way you model an object, group and even transform it, might cause some unexpected problems when it comes time to create UV Mapping.
UV Mapping, Advanced Shading Techniques
Advanced Shading Techniques can be found for $49, and can be purchased through The Render Blog. Check out Advanced Shading Techniques here. The course covers advanced topics such as procedural shading, projection mapping, python scripting, look development and much more.