Documents and useful links
The Core Competencies Self-Assessment Checklist of the American National Postdoctoral Association (NPA) gives a sample reference grid for self-assessment of skills (not only transversal). Furthermore, the NPA website offers a number of interesting resources to be consulted (especially the Publications & Resources and Careers tabs).
The "Science Careers" website of the journal Science has a useful how to section on writing CVs and covering letters. Other how to sections are also worth consulting (portal here).
The Vitae website devoted to the professional development of researchers in the UK offers worthwhile resources, such as a database of career stories or numerous publications available on line, such as the following three examples (from over 200 titles) :
The Queen Mary Researchers Careers Blog offers an overview of resources for the writing of CVs or covering letters.