"The best preparation for tomorrow is doing your best today." Preparing for any Civil Service examination is a task on its own. Books are essential, but you cannot buy every book available in the market. In this case, online sources play an important role. These sources are essential for UPSC preparation, without these your preparation will surely be incomplete. The nature of the UPSC papers is highly dynamic be it pre or mains. Let's discuss the list of websites you can use to clear the Preliminary and Mains examination of UPSC; PRS India Website: ● It is a great website for General Studies II topics ● Some Preliminary topics. ● Good for Annual Policy review, Bill Summaries, white papers, and committee report summaries. ● They have Summaries on constitutional amendments, and also some very informative vi...