Start by finding Drupal 8 modules on Drupal.org in the "download/extend" section" in "modules" and filter by version 8 ( https://drupal.org/project/project_module?f%5B0%5D=&f%5B1%5D=&f%5B2%5D=&f%5B3%5D=drupal_core%3A7234&f%5B4%5D=sm_field_project_type%3Afull&text=&solrsort=iss_project_release_usage+desc&op=Search )

Setup a site with the newest version of Drupal 8.  Download and install the Drupal 8 module you found above.  Review all aspects of the module from documentation, to comments in code, patches, and anything else you can think of.  Document any feedback positive or negative on the module page at drupal.org. Post the module page URLs here with your comments for review.