The field survey procedures employed and the response rates obtained in the First Follow-Up Survey of the National Longitudinal Study of the High School Class of 1972 (NLS) are described. The first step in data collection for First Follow-Up involved an extensive tracing operation to update name and address files. A newsletter was mailed out to enlist the cooperation of potential NLS respondents and to obtain updated addresses. A variety of sources were used to trace those not responding to the newsletter, with a success rate of over 90 percent. The survey questionnaire was then mailed to all identified subjects. Further study was then undertaken to obtain information that might lead to improvements in strategy for a Second Follow-Up. Comparisons were made between (1) Air Mail and Certifed Mail questionnaires, (2) telephone calls, and (3) mailgrams and prompting postcards. Mailgrams were found to be the most cost effective. The Census Bureau also interviewed a sample of the mail nonrespondents. Recommendations for the Second Follow-Up deal with the mailout process, tracing, and other materials sent to potential respondents. (BW)