You may ask an endless number of questions about writing to get useful advice on effective writing. You may also try to find many guidelines and useful tips in order to overcome difficulties during the writing process. It may work and might not. As for me, it is always better to see and follow an example. That is why I prefer using free essay samples instead of endless writing tips. It is better to see one time.
It is very important to proofread your paper before submitting it. If you are not sure about the grammar or proper formatting you may use these essay samples from here essay-writings.com or ask about revision services.