DMRC can take one line on lease from the Railway in Delhi, and can start metro trains at a very very low cost instead of laying almost parralel lines to Railway in Delhi. Or it can lay extra lines at the land lying vacant near Railway line instead of overhead pillars.
Secondly the fare should be ten Ruppees for all distances. One single fare of Rs.10 for any single journey irrespective of the distance, will be a boom for the Metro.