As I keep on insisting ,reading a lot on various topics would definitely improve your writing and reading skills .Many students used to ask me the secrets of doing IELTS writing and reading well . Some suggest them to memorize essays and phrases as many as they can . Few of my students tend to write essays without any
logical connectivity and jump here and there suddenly even in a single paragraph .Grammar goes to a worse situation .
But when I asked them to write essays about their family /village/university life etc (familiar topics) they used to do miracles . Hence the topic is well known ,writing skill of students boosts ,but when you are not familiar with the topic your energy level goes down an makes you under-perform .
Thus ,reading a lot on the following areas definitely would help you to score more on writing task 2 as well as reading task.