Dave Dowling has taught tech writing to professionals at universities and corporations like IBM, Lexis Nexis, Lockheed Martin and others. In this book, The Wrong Word Dictionary: 2,000 Most Commonly Confused Words, he provides a resource to help writers, even good ones, determine the right word every time. The alphabetic entries are explained with sentences illustrating correct usage. 
Book - 4 1/2 stars

You can find common synonyms in a standard thesaurus, but in The Thinker's Thesaurus: Sophisticated Alternatives to Common Words Peter Meltzer gives you different alternatives that are thoughtful and erudite without being peculiar or arcane. For any writer that wants their work to be a cut above the rest. Peter E. Meltzer is a law professor at Rutgers University.
Book - 4 stars

Merriam-Webster's Collegiate Dictionary & Thesaurus, Deluxe Audio Edition contains two products in one -- the complete Collegiate Dictionary, Eleventh Edition and the Collegiate Thesaurus. Installs easily on hard drive for instant access. Includes 21 powerful search options. Features audio pronunciations, more than 1,300 illustrations, and a Go Online option for additional information.
Software CDROM - 4 stars

Speed Reading is an important skill in learning from books and online resources. In Breakthrough Rapid Reading Peter Kump, a former Rapid Reading Expert, has created a do-it- yourself program for boosting your reading speed and comprehension. His method has already helped thousands of people read up to eight times faster.
Book - 4 1/2 Stars