For Indian geography in UPSC, candidates should consult resources like the NCERT textbooks for foundational knowledge and the Indian Geography segment of the syllabus. Authoritative texts like "Physical Geography" by Savindra Singh and "Geography of India" by Gopal Singh are also recommended for in-depth study. Additionally, regularly following relevant articles, reports, and maps from government agencies and online platforms enhances current understanding. Geographic information systems (GIS) and spatial analysis tools can also aid in visualizing and comprehending geographical data effectively.