Easy way of Booking Train tickets

Now for booking the train ticket.. its coming very easy and in only one click of mouse, you can get all the train schedules and ticket availability details for the next 15 days.
If you have time, please check this link below.

According to me, we should book the train tickets from www.irctc.co.in. But before the booking, we can get the available trains’ idea from the below link.
http://www.cleartrip.com/trains/calendar