Amazon.co. Free grammar check at GrammarBase.com. Writers Toolbox. Writer's Café fiction writing software - novels - screenwriting - short stories - creative fun. Daily Writing Tips. 40 Twitter Hashtags for Writers. By Simon Kewin If you use Twitter, you’re probably already familiar with the idea of hashtags. These are simply a way of categorizing particular tweets by including within them a keyword prefixed with the hash or “pound” (#) symbol. So, for example, tweets containing writing advice will often contain the “#writetip” tag. The point of this is to make it easier to find all tweets containing writing advice : you just search for “#writetip”. Similarly, you could find a stream of publication tips by keeping an eye on tweets with “#pubtip” in them.