The Volere Snow Card is a great way to capture the various attributes of a specific (atomic) requirement. Print this out and use it in your own requirements gathering workshop.

This template helps you to identify the stakeholder roles, the representative(s) of each role and the type(s) of knowledge that you need from them for your given project.

This Software Requirements Specification (SRS) Template created by Karl Wiegers allows you to capture the software requirements for a given software product/system.