Five Tips to Improve Writing in College by Trent Kays, in USA Today: College edition, March 2012
Be sure to check out the full article for Trent's specific advice on each of these items:
1. Write every day.
2. Take your time.
3. Quality is always better than quantity.
4. Ask for help.
5. Practice proofreading.
This is all really solid advice that I hope you will take to heart for this class, and for any of your other classes this semester that might have a writing component!
(screenshot from Trent's teaching portfolio)