Candidates can enhance their writing skills for UPSC by practicing structured answer writing. They should focus on clarity, coherence, and conciseness by adhering to a structured format: introduction, body, and conclusion. Regularly writing essays and participating in mock tests can provide valuable feedback. Reading newspapers, journals, and quality articles also helps in exposing candidates to different writing styles. Additionally, revising grammar and vocabulary while seeking peer reviews can enhance their overall writing prowess, making essays and answers more impactful.