English is confusing sometimes because of it’s rules of grammar and spelling. Here is the list of Common Errors in English usage and how to avoid some of the regular English mistakes. Fox example adding “disc” to CD-ROM as CD-ROM disc is redundant. Another common error is, when to use than/then — choose “then” talking about time and than for comparisons.
Here is a list of most common errors in english and how to avoid those by correcting practically by Paul Brians, Professor of English, Washington State University.