What is best preparation plan for securing iit seat

Hello Satish,
You should try to start every chapter from basics and then increase your level. You should practice lots of question and it's previous year questions. You should join one or more than one test series and try to build the concept of partcular questions which you feel was difficult for you during test, it would enhance your chances to secure a seat in IIT . One more thing, always try to solve questions in limited time...
Hope it Help !!!!!!