Writing is not a solitary activity, and can be improved by spending time in conversation with others.
By writing from conversation, ideas from others and ideas from oneself are both captured.
I talk to David Perell, AKA The Writing Guy, about why online writing is one of the most important skills you can have and how you can do it more effectively. David has his own online writing school, called Write of Passage, and shares many of his insights on Twitter.