You can surely score above 7 bands in IELTS Writing if you don’t make these common mistakes.
Introduce each and every new idea in a different paragraph.
Always use this 3 part format: Introduction -- Body paragraphs -- Conclusion
Never present an unclear position. Always think before you write.
Always recheck spellings. Remember that computer-delivered IELTS does not have a spell-check.
Use your own words. Don’t use memorised phrases like ‘old is gold’
Use real-life examples from your own experience, not surveys as they can be checked for authenticity!