This is an excellent guide for configuring SharePoint 2010 with applications such as SQL Reporting Services, Excel Services, Visio Services etc.
This document provides you with information that will help you understand the concepts of identity in SharePoint 2010 products, how Kerberos authentication plays a critical role in authentication and delegation scenarios, and the situations where Kerberos authentication should be leveraged or may be required in solution designs. The document also shows you how to configure Kerberos authentication end-to-end within your environment, including scenarios which use various service applications in SharePoint Server. Additional tools and resources are described to help you test and validate Kerberos configuration. The "Step-by-Step Configuration" sections of this document cover several SharePoint Server 2010 scenarios.