I am currenting in class 12 & iam  simultaneosly preparing for IIT can ony one suggest what should i do for IAS preparations

First start reading a good national newspaper daily. You can read either the Hindu or the Times of India. Make it a habit to listen to the news everyday. Always try to know more about other states and their cultures in the country. If you are interested in IAS then choose the subjects you are good at and work very hard in your graduation. Prepare for the exam simultaneously and keep in the touch with the gang.