Even though that a penetration test is a creative process most people maintain private checklists to ensure that they will not forget to test various scenarios and maintain the overall quality of the assessment.
The aim is to create detailed checklists that can be used by penetration testers during their assessments. Every checklist will be linked with a detailed blog post on https://pentestlab.blog which will describe the technique and how to perform the required task. Information will also be included in the Wiki page on Github.
If you noticed than a checklist is not complete please perform a pull request or contact me on Twitter @netbiosX