1. A method of instructing at least one operator in a best practices implementation of a process for managing capacity in an information technology (IT) environment, the method comprising providing instructions to the at least one operator to perform acts of: (A) monitoring the IT environment to obtain a baseline profile of the IT environment under normal operating conditions, wherein monitoring the IT environment comprises monitoring CPU utilization and evaluating the presentation time of a web page; (B) storing information obtained from monitoring the IT environment in a capacity management database; (C) maintaining a configuration management database that stores information regarding service level agreements with which the IT environment is obligated to comply; (D) performing capacity management in a hierarchical manner that comprises at least the following distinct tiers: a business capacity management tier that ensures that future business requirements for the IT environment are considered, planned and implemented in time to be functioning when business needs make them desirable; a service capacity management tier that focuses on the management of the performance of operational services provided by the IT environment and used by users of the IT environment; and a resource capacity management tier that focuses on the management of individual components of the IT environment; (E) creating at least one software model that simulates at least one of the following aspects of the operation of the IT environment: (i) utilization of devices, (ii) transaction latencies, or (iii) performance bottlenecks, wherein the software model is created using information stored in the capacity management database and information from the configuration management database; the at least one model comprising at least one model of the IT environment at the business capacity management tier, at least one model of the IT environment at the service capacity management tier, and at least one model of the IT environment at the resource capacity management tier; (F) running a plurality simulations on the at least one software model to evaluate how the IT environment will perform under various operating conditions; (G) evaluating, based on the simulations, whether the IT environment satisfies each of the service level agreements stored in the configuration management database; and (H) based on information derived from the at least one model of the IT environment at the business capacity management tier, information derived from the at least one model of the IT environment at the service capacity management tier, and information derived from the at least one model of the IT environment at the resource capacity management tier, modifying the capacity of an IT environment by performing at least one of the following acts: (i) modifying or adding a physical component to increase the network bandwidth, (ii) increasing disk capacity, or (iii) increasing the number of servers.