The most perfect way of preparing for IELTS is through continuous practice. Start with an initial assessment to understand your areas of strength and weakness. As you complete your assessment test focus more on your weaker sections so that you get trained in that module well.
There is also an assumption that reading passage 1 will be very easy than the other two, but the fact is that they are not so. The same notion is present in the case of listening, it is said that section 1 will be easy compared to section 4. All this is because we start a session with a fresh mind but as it crosses 25 minutes we get bored with the module and feel it be tough.
Anyhow continuous practice leads to good scores.