In learning how to develop your own style of writing in academia, you're often left with few alternatives beyond emulating the style of your advisor, or to pick and choose from the core articles in your reference literature. In my experience, this is how most graduate students get started with their writing, and there's nothing wrong with that, provided you do get some input from your advisor and perhaps also from your peers. Sure - there exist courses on scientific writing, but you might not have the opportunity or inclination to follow one. Before grad school they might not have any appeal, and once you're enrolled in grad school, odds are your department won't allow a scientific writing course count towards your required course load. Luckily there are some awesome books which make developing your own voice easier. In this miniseries I'm going to describe some books I've found to be helpful, starting with:
A Writer's Reference - Fifth Edition by Diana Hacker
This book is a freakin' treasure of a reference manual. It even lies flat so it's easy to consult while reading or revising a draft. Each subsection is clearly marked with a tab and an intuitive title such as "C: Composing and Revising", "D: Document Design", "S: Sentence Style", "W: Word Choice" etc. The chapter about composing and revising actually inspired me to try some new approaches to writing papers, and the sections on sentence style and grammatical sentences. This book is gonna lie open on my desk while I work on manuscripts on Wednesday.
You NEED this book!