I have made a PPT that contains a lot advice on how to improve your language for IELTS. It most relates to the IELTS Writing Exam, but it could be applied to other parts. Key lessons are avoiding IELTS phrases and upgrading boring or repetitive language.
Improve Your IELTS Writing With Parallelism
Essay Correction: Roads or Railways?
How Important are Idioms for IELTS?
Describing a Map of Garlsdon [IELTS Writing Task 1]
Talking about Holidays and Travel for IELTS
Get a FREE handbook for IELTS grammar
Describe a Modern Building [IELTS Speaking Part 2]
A New Year Resolution: Getting Your Dream IELTS Score