Candidates should develop several key logical reasoning skills for the civil services examination. First, they must enhance their analytical thinking to break down complex problems into simpler components, making them easier to address. Second, mastering syllogisms and deductive reasoning allows candidates to draw valid conclusions from given premises. Additionally, developing the ability to identify patterns and relationships between different pieces of information is crucial for the quantitative aptitude and various sections of the examination. Lastly, practicing critical thinking through puzzles and analytical questions can improve decision-making skills, providing a competitive edge in the examination.