The spot observation method of estimating time use is described in this article. Procedures for using this method in developing countries, where household activities are relatively easily observed, are contrasted with procedures used in countries characterized by very private living units and highly separated employment, educational, and household settings. Characteristics of various methods for collecting time use data are compared so that researchers can evaluate the trade-offs they can expect from selecting a particular method. A case example of using the spot observation method in a study of women's household and agricultural activities in the Njoro Region of Kenya is presented