Writing is not a chore
Many students see writing as a chore. I finished this study and have great results, now I have to write up the paper, boo. I want to attend this workshop, but oh drat, they want me to write two pages about something relevant to the workshop.
Repeat after me: Writing is not a chore.
Writing may be difficult. You may struggle to explain your ideas coherently and concisely. You may be in a never-ending battle with proper English grammar.
Writing may be time-consuming. You may spend an hour agonizing over one paragraph. You may stay up all night trying to finish a two-page paper (not counting the hours spent trying to get the Latex formatting to work or wrangling Word).
Writing is not a chore.
Writing is practice
Writing is practice. Writing is a key means of communication -- in academia and in the rest of the world! Learning to write well will never hurt you and only help you.
Writing is planning. Writing is thinking. Writing is synthesizing.
Writing your ideas out with an eye for communicating them to others can help you see the flaws in your arguments, come up with new connections between ideas and fields, or generally help you organize your thoughts on a subject. Introductions and discussions are especially great for this, since these are the parts of a paper where you connect your work and your ideas to everyone else's.
But not all writing has to be super academic or for a specific purpose. Journals, notebooks, text files: you can jot down ideas about what you're reading and thinking about. Whatever that is. Review your notes periodically. You may see patterns. You may develop new research ideas or figure out themes in your interests.
Write a lot.
It isn't just me saying this. Multiple advisors have told me: Papers become chapters in theses. The act of writing can add rigor to your thinking. Write as you go. Don't just write it all at the end!