To transition effectively from preliminary to Mains preparation, aspirants should focus on developing an in-depth understanding of the syllabus and practicing answer writing. They should analyze previous years' question papers to discern patterns and key topics. Daily writing practice is essential, allowing candidates to articulate their thoughts clearly and concisely. Additionally, reviewing within a timed framework can help in managing time effectively during the actual exam. Regular feedback from peers and mentors can also significantly enhance writing skills.