While you are hunting for a job you need to be writing something daily. It doesn't need to be much, just write something. Maybe about 50-100 words per day. This is about the length of a cover letter in many cases. What you'll end up doing is improving your typing speed and you'll be able to write everything more effectively. Make sure you are looking for spelling and syntax errors in everything you write including in your daily practice sessions. That way you can avoid them in the future. Have a great day and I wish you the greatest success.