To prepare effectively, you need to read at least one National Daily from General Studies point of view. For developing analytical prospective, focus your attention particularly on editorial everyday.
'The Hindu' is the most prefered choice among Civil Services Examination aspirants.
For economic coverage, you can look at the 'Economic Times' or 'Mint' (from Hindustan Times Group).
However, you can continue reading the newspaper you subscribe to, if it is fulfilling your needs.