The following link may assist you in topics that include:  Mathematics, Dates, Times, Stats, Places/Geography, Chemistry, Materials, Words, Culture, Earth Sciences, etc.  This program will also  graph, plot, etc.   http://www26.wolframalpha.com/

This link is a step-by-step guide for GIS people who are not Excel professionals. This site is geared to crime analysts that has very useful material related to geocoding and working with address data:     http://www.bairsoftware.com/downloads.html

The link to the Excel scrub technique is:  http://www.bairsoftware.com/downloads/articles/How-To-Concatenate-and-Trim-Fields-in-Microsoft-Excel.pdf

Here's another good article on the site:  http://www.bairsoftware.com/downloads/articles/Getting-to-the-Point-Data-Scrubbing-and-Cleaning-101.pdf


Web Site Guide:

N-Dex - Law Enforcement National Data Exchange
http://www.fbi.gov/hq/cjisd/ndex/ndex_home.htm
Creating an electronic catalog of criminal information from around the country, give it some powerful search and analytical tools, push relevant information to users through subscription alerts, and enable new levels of communication and collaboration between those with similar interests. That’s the vision for N-DEx, the Law Enforcement National Data Exchange initiative.  N-DEx is currently under development by the FBI and its partners, and the first stage will be launched early next year. Learn more here about how it works and how it will improve law enforcement’s ability to fight crime and terrorism