u should try to hold ur pen in a perfect way. This has a great influence in ur writing. While writing try to keep your book straight to your face i.e., do not turn your book sideways keep it straight to your eyes, otherwise you will have strain in your eyes, i knew this is no the answer for your ques but try to do it, you will feel easy, even though it feels tough at the beginning.
above these follow the instruction given by shravani. You should know that your writing is having a great role in your life