Common Errors in English
Proofreading is an essential skill for writers, editors and publishers! Errors in grammar, punctuation, style, and consistency are glaring indicators of unprofessionalism, and far too common in self-published manuscripts!
We could reinvent the wheel and plagiarise other's great work, but we would rather here are five dedicated websites that focus on the most common errors in English. These will tell you how to identify those errors and (more importantly) how to correct them.
The Department of English at the University of Calgary has prepared an alphabetical index of common writing errors with links to a series of excellent grammar tutorials. The explanations are straightforward, and the examples are clear and concise. Useful for teachers and students alike.