This site has excellent writing resources in the form of daily articles on a variety of useful topics relating to English grammar, spelling, misused words, and other common writing issues. To find articles that address the topic that you are interested in, just type in your keyword in the search box and you will be taken to useful articles on this site that address your writing issue.
As an editor, I particularly enjoy reading the discussions on diverse topics relating to the appropriate use of the English language on this site. You can post a question on the site and individual experts will respond, providing you with their views. These may differ, and you should get a sense of the intuitive grasp of native English speakers that lets them know when something feels “odd.” But you will also learn about the mechanics of language use and will get very valuable feedback in response to your query.
For those who use the APA style in their writing (journal articles, dissertations, or books), and who need quick responses on matters of APA style, this blog, written by experts from the American Psychological Association (APA), provides invaluable resources. You can search for the topic you are interested in or choose from one of the tags. The articles, written by APA experts, are clear and easy to understand.
Like the APA, the Modern Language Association (MLA) offers a very useful and informative blog titled “Behind the Style” on matters of MLA style. Users of this style will find it very helpful. It also provides articles on more general questions of style, such as how to use colons, en-dashes, and hyphens, or where to place “however” in a sentence. You can also access various helpful resources, including sample MLA papers on the website.
If you just need examples showing you how to format your citations (in your manuscript, notes, and bibliography) using the Chicago Manual of Style (CMS), this reference guide, offered by the University of Chicago Press, is comprehensive and easy to follow. You can also access useful articles on the CMS blog, which can be accessed here.