Effective, Efficient, Effectual, and Efficacious: Attempts to Define
Are there some words that drive you crazy because you're not sure which of many apparent synonyms to choose?
Maeve Maddox, who writes the Daily Writing Tips blog, discusses the various ways that the words "effective," "efficient," "effectual" and efficacious can be used.
I thought that these words may play a part in your scholarly writing; or maybe, like me, you just enjoy thinking about words and language.
If so, then check out her blog. It will be an efficient use of your time, and may be an effective way to improve your writing.