Livia Montana and John Spencer (2004) "INCORPORATING GEOGRAPHIC INFORMATION INTO MEASURE SURVEYS: A FIELD GUIDE TO GPS DATA COLLECTION"
The GPS survey manual for Demographic and Health Surveys.
Yale Map Collection (200?) "GPS & GIS: Collecting Spatial Coordinates and Using them in ArcGIS"
This manual is more technical than the above.
UNICEF MICS surveys use Garmin eTrex 30. GPS data collection manuals are downloadable here.