To check your grammar and spelling, the best way is to look it over carefully yourself, then have a friend or family member read it. Self-editing is a great way to catch mistakes quickly and effectively. Additionally, there are many online tools that can help you check your grammar and spelling more thoroughly. Grammarly and ProWritingAid are two popular spell- and grammar-checking services that allow you to upload documents or paste text into their webpage to be checked. Both of these services offer a free version, as well as more advanced paid options. Plus, Google Docs offers a built-in spell-check feature – just click “Tools” and then “Spelling and Grammar”. Another great option is to have a professional proofreader go over your work before publishing or sending it off. This may be time-consuming and costly for some, but it is one of the most effective ways to guarantee that your writing is error-free.