The biggest mistake is prepping without knowing the format, marks are usually lost not because of weak English but because students don’t know what each task is asking, so learn every question type before test day. Don’t memorise essay templates; examiners spot them immediately, and structured thinking will always serve you better than scripted answers. Build vocabulary from what you read rather than isolated word lists, give yourself at least 6-8 weeks rather than cramming, and spend more time after each mock reviewing your mistakes than you did taking the test itself.