Hello aspirant,

No need to worry you have lots of time left. One year is sufficient to score good marks in JEE.Preparation for any competitive exam needs more smart work and time management. Don't just read what your teacher teaches you. In depth understanding of the basics is really important. Don't waste your time rather use it judiciously. Ask doubts immediately don't postpone them for future. Never let your practice test marks affect you , learn from your mistakes. Focus more on previous year questions of IIT JEE.

Most importantly do not forget  to relax! It helps you remember things better and refreshes your mind.Keep yourself motivated and updated!

Best of Luck!!!