One of the features of BibleWorks which I have really grown to appreciate is the Word List Manager. In a nutshell, the WLM allows you to create and use lists of words in your exegesis. At first this might not appear to be very helpful, but the usefulness become very apparent as you begin to use it. As a teacher this feature is very helpful because I can use it to focus on words which match particular parameters. For example, in A New Reader's Lexicon of the Greek New Testament we wanted to highlight all words which occur less than 50 times in the New Testament. This was a breeze with the WLM: I simply created a list of all words which occurred 49 times or less in the NT, then found every place where those words showed up. I could use that same list to highlight rarer words for my NT103 class as we study Philippians. The other day in class a student asked me about interjections in the NT, so I used the WLM to quickly show all the words classified as interjections in the NT.
As an exegete this feature is indispensable because words are a critical building block of exegesis. Let's assume I'm studying Paul. Using the WLM I could quickly find all of Paul's unique words. I could quickly find all the words that are unique to Galatians, or Ephesians, or what have you. I could locate where Paul's terminology overlaps with John's. And not only that, the program then allows me to seamlessly move to lexicons, so I can begin to do some in-depth study of word meanings.
The possiblities are quite varied, and the WLM is flexible enough to handle most anything you could think to do. If you are a BibleWorks user, I encourage you to learn this feature well.