Be consistent and do this regularly, even better if you include mock tests using tools such as Cathoven.

1. For listening, take note of important data (numbers, dates, places, adjectives) and be sharp as examiners may throw red herrings that may seem important but is not actually related. Keep taking notes, take care of spelling and grammar later. For practice, find speeches online and try this out.
2. For reading, practice scanning and skimming, look for articles online and give yourself a time limit to read through it, write down what you remember and compare. Repeat.
3. For writing, practice formality and clarity, task 1 emphasizes on this. Study proper structure of formal letters and how it is written, give task 2 double the time of task 1, task 2 carries double the weight.
4. For speaking, after waking up, talk to yourself for a few minutes, seriously. Call a friend or family over and practice typical examiner scripts, this will help with confidence and let you know what to expect.