If you are worse at one IELTS skill than others, you should focus more on it. For example, your IELTS Reading score is 5.5 while other skills are over 6.0, you should get down to improving your reading skills by using this excellent book by Sam McCarter: Improve your IELTS Reading Skills. (This famous IELTS author published an “Improve your IELTS skills” series including the above mentioned book, Improve your IELTS Writing Skills and Improve your IELTS Listening and Speaking Skills, you can check out for these great books).
You can also download ebook to study at home:
http://ieltsmaterial.com/improving-ielts-reading-skills-sam-mccarter/
http://ieltsmaterial.com/improving-ielts-writing-skills-sam-mccarter/
http://ieltsmaterial.com/improve-ielts-listening-speaking-skills-ebook-cds/
Each day, you should learn at least 10 English Collocations and New Words for top 9 common topics in IELTS (crime, education, health, media, work, energy and environment, traffic, people, home).
How to learn Vocabulary in the most effective way?
Jot a new word down to a notebook in terms of various topics (with its translations or definitions)
Write the words and definitions on sticky notes or a small piece of paper (you should write the New word on the front side and its definition on the back side. So that you can only turn the note back when you forget its meaning)
Speak new words out repeatedly. In case you get access to the Internet, you can use the online dictionary to learn how to pronounce them)
Make associations (in pictures or with other words)
Have somebody to test you about new vocabulary
Utilize them to practice for your IELTS speaking or writing
However, if your English level is quite low (like current band is 5.0 – 5.5 and you want to get Band 7.0+) you are less likely to get the score you need. In fact, IELTS learners with just one month left for the IELTS exam will get panic and work their socks off to improve their Vocabulary, Speaking, Listening, Reading, Writing, and Grammar. They just digest tons of books without any study strategy. My suggestion is that you need to draw up an effective and coherent study strategy to improve your general level of English and learn exam technique.
2.1 For scheduling your study
A multitude of students have more than 3 months to study and they do a little bit of work every week for the first 2 and a half months and then realise that their exam is next week and they still know very little. So what should you do? Don’t let this happen to you by scheduling your study. As I mentioned above, you need 3 factors to get a high score: Focus, Commitment, and Hard Work.
First of all, you must stop doing non-essential things for the entire time before your exam (stop checking Facebook every 10 minutes, playing games on your cellphone, wasting time with friends or watching TV). These non-productive things waste an unbelievable amount of time that could be better spent improving your chances of getting the score you need. This might sound harsh, but if you want to get a seriously high score, you have to work seriously hard. For me, hard work is the number one differential. It doesn’t matter how intelligent you are or how naturally good you are at learning English, if you work hard, you will get the scores you need.
Make a to-do list. These should be as specific as possible e.g. learn technique for part 2 of speaking test, listen to podcast every day, read 4 English newspaper articles each day, practice test etc.
Work out how much free time you have every day from now until your test.
Get a calendar (make your own calendar or use an electronic one) and fill out what you are going to do every day before your test.
Tick off every day and every task you complete as you do them.
Don’t skip. If you miss something, go back and do it.
If you follow the advice above you will be more prepared than 95% of people doing the test
2.2 For improving your general level of English proficiency
You should immerse yourself into English at least 6 hours per day. It means you will be a full-time IELTS learner and you need to listen to English and read English daily. You should also be writing and speaking in English as much as possible.
I suggest that you should get access to the most popular magazine World News, Politics, Economics, Business & Finance, BCC learning English to improve your Reading and Listening skills and learn Vocabulary and useful structures for Writing Task 2.
For Speaking, you just need this site: IELTS Speaking: Face the IELTS Speaking exam with confidence.
You can also study from these great Youtube Channels: Learn English with Emma [engVid] | AcademicEnglishHelp | IELTS Ryan
To practice daily, you can download Top 8 IELTS Books and do at least 1 practice test per day.
2.3 To learn exam technique:
You must also learn about all of the different types of questions and how to approach them for Listening, Reading, Writing and Speaking. The great thing about IELTS is that it is fairly predictable. For example, if you are doing Academic Writing Task 1, you just need to learn how to write a summary of at least 150 words in response to a particular graph (bar, line or pie graph), table, chart, or process to get a decent score.
You can also make use of the following books to learn more exam tips, techniques: IELTS Target Band 7: How to Maximize Your Score, The Official Cambridge Guide to IELTS.
Hope that you can follow these suggestions to maximize your limited time to score your highest in IELTS!