5- Check the transcripts
IELTS is a challenging task that you should really prepare for. All practices that you do should have solid material so you can identify your weaknesses and target them.
So when you are done with watching or listening to a TED talk, check the transcript. There you will realize the difference between spoken and written language in different accents.
By reading the transcript, you can identify the new words that you guessed their meaning. Now you can check the dictionary and find the actual meaning. This way, the word will be hardwired into your memory.
You can also check the spelling of the spoken words in unfamiliar accents, so you avoid making spelling mistakes in the actual exam.
Grammar can also be practised with the transcript. Notice how verb tenses are chosen and a variety of sentence types are used. Please pay attention to discourse markers and complex sentences because they are critically important for higher scores.
Also, pay attention to the logic and organization of the talk on the transcript. Identify the pattern and use it for your writing practices.
Compare your summary with the transcript to see how well you understood the main idea of the talk and how many details you identified.
Go back to the talk and micro-listen to the parts that you had a problem with. The new words, specific elements of accent or grammatical issues, and replay them repeatedly until you memorize them.
Now, you can move on to the next TED Talk!