Proofreading your own work is not an easy task. For students and writers, they surely know how hard it is to proofread their own work. That is why it is more advisable to have someone to proofread your work because it is easier to see the mistakes if the person who is checking the essay or article is different from the author.
But of course, you can not always depend on somebody to proofread your work. The most basic technique for successful proofreading is to read very slowly. This is the skill that I myself need to develop because I always tend to read fast and so, I always overlook some misspelled words and few grammatical errors. All I can do to help myself to read slower is to read out loud. I also read out loud when I can not understand the concept or essence of what I am reading.
I found a great inspiring article that can surely help us to accurately proofread our own writings. This article revealed that it is twice as hard to detect mistakes on your own. And it is really surprising to know that professional editors proofread up to ten times and publishing houses hire teams of readers to work in pairs, out loud. But despite of these, errors still occur sometimes. So it is not unusual to still have mistakes even after 2 to 3 times of editing. All you need to do aside from reading slowly is to be patient so that you can go through and through your work until it is perfectly written.