Prelims and Mains may look different, but they come from the same syllabus themes. The difference is only in how UPSC tests them. Prelims checks conceptual clarity through objective questions, while Mains tests explanation, analysis, and examples.

The easiest way to connect both stages is to study each topic once with conceptual understanding, then practice PYQs from both Prelims and Mains. This helps you see how the same topic can appear in different forms.
When preparation is syllabus-based instead of exam-stage-based, Prelims and Mains preparation naturally become integrated.