1. u need to b registered wid irctc.
2. Login to IRCTC in plan my travel put ur journey start and end points ( not more than 4 characters) and date and put quota tatksl
3. Click find trains and u will find all trains running between these pair of stations
4. Select d desired train, click on desired class and click book...
more...
5. Enter all reqd details and click Go
6. Proceed to payment node as per instructions.