This document is intended to provide technical details on the methods and measures used in the Healthy Retirement Project. These details are reported in six sections: Funding, Background, Recruitment, Procedures, Samples, and Measures. These sections are followed by data on scale means and a list of publications arising from the Project. The most substantial part of the document is the section on Measures. This section of the document is intended to provide sufficient technical details on the items and questionnaires used in the study to reduce or remove altogether the need for substantial descriptions of measures in future publications. This material is often repetitive and of little interest to the general reader. Appendix 1 includes the focus group interview schedule, while Appendices 2, 3 and 4 comprise the questionnaires used at S0 (“Pre-retirement”), T0 (“At the time of leaving work”) and T12 (“One year after leaving work”) respectively.