The way I write more is by doing it every day. I write first thing in the morning (journaling and note taking) and publishing my notes (like this one). For work, I write product briefs to clarify the situation, my interpretation of the facts, and what we should do about it. I write memos for the team for anything important. I write investor updates. I do it without thinking—even when drafting a tricky email I’ll write it out to understand what I’m trying to do.
Taking an interest in good writing helps. Being curious about what makes for good communication, reading about writing, and trying out new things to try and communicate more clearly. To cultivate that, I recommend The Pyramid Principle by Barbara Minto which is the best business writing book and reading about where knowledge with The Beginning of Infinity by David Deutsch.
Using tools you enjoy gives something to look forward to while building up a writing habit. For example, a fountain pen, a nice notebook, a mechanical keyboard, beautifying your favorite text editor, or generally improving the ‘hand feel’.