Which Academic Resources Help Students Improve Their Assignment Quality?

Recently, I had to submit a university assignment that involved detailed reading, proper referencing, and a clear explanation of key ideas. I spent plenty of time researching, but I still needed to improve the structure of my work. While looking for useful resources, I came across assignment writing services and wanted to understand what support options students usually consider. My goal is to develop stronger writing skills and learn how to present information correctly. Has anyone used online study guides, proofreading tools, or academic tutoring? Please share your experience and suggest reliable resources that have helped you handle assignments more effectively.