https://www.businessbecause.com/news/gm ... correction*There is a small video inside the link that goes over the tips, people.
1. Read and underline the errors
Start by reading the questions and underlining any obvious errors.
2. Learn the different error types
The GMAT uses several different types of sentence correction. Learn how to spot these and it'll speed up the process.
3. Read through each option
If the error isn't clear, read through each option and see which makes most sense as you read it.
4. Make a list of idioms
Make a note of idioms and phrases that pop up as you're doing your prep.
5. See if you can simplify the phrase
The GMAT will use deliberately confusing phrases. Try and take these out to simplify.