I thought I'd share some tips that worked wonders for me. I took the exam last October and got a score of 200 out of 210!

1 - This is quite obvious, but watch shows and listen to songs in English as much as you can.

2 - Try to write at least 2 essays every week.

3 - Look for mock exams.

4 - Do not revise the night before, you´ll only get more anxious.

5 - In the speaking part is key to ask your partner.

6 - Find someone to practice speaking, I recommed the italki website.

7 - Change the language of your phone to English.

Here are some resources I used:

COMPOSITION NOTES Essays C1 and C2

OPEN CLOZE - CHEAT SHEET

CAE 2015 EXAMS

Moreover I recommend these books:

Exam Booster for Advanced. Self-study Edition

Destination C1 & C2 Grammar and Vocabulary. (with Key)