I guess IELTS is easy if you understand the technique to approach the exam. You also need to take lots of tests. I took the exam and got overall score of 8.0 in just the first attempt. My wife with limited preperation was able to get 6.5 (she needed only 4.5). So doing loads of practice is the only option. Write lots of essays, if needed get it corrected by some English teacher or something. It is just not about English, it is about confidence when you are sitting for the speaking test. There are loads of materials online with example speaking tests. My wife used to ask me questions from them and I used to answer as I would do when I am in the actual test. Believe me it really helped as I got 8 in speaking.

Best of luck for the test. If needed get some tutions for IELTS and see if it helps.