How to Reduce Errors in Writing
Write first and then edit
When you have freedom of thought and flow, you may be more creative in writing. So don't write and correct at the same time! First - write. Then - edit. You'll see better results.
Give yourself time
Be sure that if you write, you have still much time to read it many times and check spelling mistakes or some errors.
Quality over quantity
Write a little less but check if things you have written make sense.
Print your paper out
Not always you'll be able to see all mistakes on the screen. Seeing your work in a different medium is OK. Print your paper and make a correction.
Find yourself a proofreader
It’s good to find a new pair of eyes to read over your paper. Maybe there are words or sentences that are hard to understand for another person. Ask a friend or family member to read it and wait for the feedback.
Read lots of well-written prose
The best way to improve your writing is to read more!
Focus on one error at a time
Scan your work for different types of mistakes. First - find the spelling mistakes. Then - focus on grammatical mistakes. Finally - check if your text is logical and consistent.