Nowadays Components-Based Development and Requirements Engineering (RE) are very active and growing fields in Software Engineering (SE). In this paper we present the preliminary ideas for a proposal of a component selection method whose development is fast, agile and requirements driven. The presented method is called COTSRE and it is based on SIREN, which is a method of RE based on the standards of this discipline and the use of reuse requirements catalogs. The final aim of our proposal is to achieve an RE method that guides the selection, the development and the composition of a set of independent software components, and whose application is the simplest possible. In this paper we also present some simples examples related to the domain of electronic mail applications.