Scribble down a new word every day - You could try to make your task easier by restricting yourself to just a few words per day.
Challenge your ears by listening to podcasts - Find a regular time each day to immerse yourself in an English-language podcast, such as just before bed or during your commute.
Watch TV shows or films (without subtitles) - Not down any words or idioms that you are not quite sure about while watching the show, like ‘master’ or ‘pyromancer’, and look them up afterward.
Read English-language newspapers and magazines - Being able to read news in a foreign language is a very good indicator of your fluency level.
Study on the go with an app - There are many free language learning and/or test-specific gaming apps to help you prepare.