For studying science and technology for UPSC effectively, candidates should begin with NCERT textbooks, which lay the foundational concepts. Following that, referring to standard texts like Reference books by Ravi P. Agrahari and others can reinforce understanding. Staying updated with current advancements through reputable sources like scientific journals and news articles is key, as technology frequently evolves. Engaging in topic-wise revision and practicing previous question papers regularly will enhance knowledge retention and performance in the exam.