This script expands on the usp_KillUsers script posted by Brian Knight, by adding the text of the process that is being killed and will even kill users who are accessing the database from with in a process of another database. Does not contain the NET SEND option though.
For most DBAs, normalization is an understood concept, a bread and butter bit of knowledge. However, it is not at all unusual to review a database design by a development group for an OLTP (OnLine Transaction Processing) environment and find that the schema chosen is anything but properly normalized. This article by Brian Kelley will give you the core knowledge to data model.