I think it was Graham Greene who used to say that he aimed to write 500 words every day. The novels were soon created. This might not sound like a lot of words, but there are two great advantages to this method. Firstly, 500 words every single day, even when some of the words are later amended or discarded, soon builds up to a substantial narrative. This narrative can then be edited, refined, extended or reduced. Secondly, and perhaps more importantly, the routine act of writing down 500 words each day cultivates a mind-set which develops with constant practice, so that it becomes easier to express your ideas in writing. For some people, it may never become easy, but it does become easier. It helps if the writer is also a regular reader. To become familiar with the way other writers express themselves in text, even if their language or the style is unfamiliar or even disliked, is a useful skill because it enables the writer to understand their own style, and how to capture in words what they want to say.
Most academic writing has a different appearance in style to other forms of literature, because there is a different purpose behind it. As a scientist, I am the first one to agree that scientific writing can also be creative, but analytical writing for an academic purpose – whether this is for science, arts, or the humanities – demands that the text is anchored in such things as theories, concepts, and evidence. Most non-academic writing (apart from things such as biographies or popular histories) do not require citations (e.g. “(Rennie, 2017)” but these citations are essential for academic work to provide the sources of the evidence on which your subsequent ideas are based.
In order to get into a routine which suits your own working style and personality, you need to experiment a little. Some people, like Graham Greene, prefer to set-aside some time each day to write. Others only write when the mood takes them, when they feel inspired, or when a deadline looms over them. Personally, I find writing very easy to do, and I enjoy it, so I have different behaviour patterns for different situations. I know that I can sit down and produce something very quickly if I need to (like a report of work done), but for deeper and more complex work (such as a journal article or research paper) I like to start off with a working title and some headings to give the article a bit of structure. With the general ‘story-line’ in my head, I will then sit down to write the various sections when I think I know what I want to say in each section. I build the article up, then leave it a couple of days, read it again, and make any minor changes. I rarely re-write anything substantial unless I obtain new information or get feedback from a reviewer to expand upon some point of explanation. So, my routine is to establish what I want to say, build up the article as a story, then tweak the final draft until I am satisfied that I have expressed what I want to convey. Other writers will write, re-write, and re-re-write as their ideas change and the article evolves. A key point in all of this is that the finished piece of text, whether it is a research paper or a dissertation, should be enjoyable for the reader, so try to avoid long, cumbersome sentences and clearly signpost the direction of your discussion. Numbered headings and spell checking is also important, so make sure that you develop your own routine to check and double-check each stage as you progress with your text.