Got a monumentally low grade on your last essay for class? Don't worry; it happens to the best of us. Your best recourse is to learn from that and make the next one the best you've ever written. Are you ready?
1. Stay with your structure. If you have a particular way of working and writing, stick with that. I'm not a big fan of overhauling people's processes - it creates more chaos than clarity. Stick with your current structure, but don't let it get stale. Instead, improve it one part at a time. Always implement new techniques (such as using writing correction software) within your existing context, rather than building one from scratch just to accommodate it.
2. Work on your weaknesses. What's the biggest flaw in your last essay that got you the poor marks? That is what you'll be working to improve on in your next essay. Ask your professor how you can improve on that particular area. If you don't get a satisfactory answer, consult good books.
3. Recognize your strengths. What's the one standout thing that was good about your essay? Identify it and embrace it - it's an area you're good at. Remember the old saying, "Always put your best foot forward"? That area is your best foot - employ it heavily in the next essay you write.
Will you become a master essayist overnight? Hell, no. However, this is a solid plan that will help you build up your essay-writing skills one brick at a time. At the end of the day, that's what learning is about - building up your skill set in a slow but sure manner.