1.Making sure that you treat each question with equal merit is a big take home point.
2.Reading all the options carefully. Very important in questions which asks you the 'most appropriate meaning'.
3.Trying to get to the answer by whatever means you have. Many a times the questions may be unheard off but if you have a wide knowledge base you can eliminate options based on existing facts.
For example this question appeared in 2020 Prelims
With reference to the period of Gupta dynasty in ancient India, the towns Ghantasala, Kadura and Chaul were well known as
(a) ports handling foreign trade
(b) capitals of powerful kingdoms
(c) places of exquisite stone art and architecture
(d) important Buddhist pilgrimage centres
The three towns given were unheard off-not covered in regular texts but see the options
Capitals of powerful kingdoms-must have been known to someone who has prepared for 2-3 years. So eliminated.
Places of exquisite stone art-Again we know only of Mathura,Sultanganj,Ajanta,Deogarh.
Important Buddhist pilgrimage sites-lumbini,kushinagar,sarnath etc is what one stumbles across.
Therefore we are left with only one option.ie a.. that's how i got this question right.