It's always better to follow someone's experience in order to find useful things for yourself. Here is an article with tips from the famous author to improve your writing skills.

1. Simplicity for all
You wouldn't argue that Harry Potter is considered as a fairy tale which is meant to be read by kids, but who among adult people can confess they haven't looked through at least one book about this boy with the scar? Actually, I do believe that the popularity of J.K. Rowling's books is astonishing because it is easy to read. Initially designed for children, these texts appeared to be good for older people around the world. I am stressing on this fact as those who are not native English speakers have discovered it as a comfortable reading thus they can bring English skills to a higher level through diving in the magic world created by the author. And that is amazing considering what a vast number of boys and girls, men and women have Harry Potter on their shelves or in the tablet PCs. Only a talented writer could choose such a middle way both not too difficult for her young audience and still attractive for others. Should she write in a slightly other manner and success would never come.

Probably this is not easy to achieve such result as there are no certain rules to follow it, you just have to feel the flow of the text. But one thing to keep in mind - never to use unnecessary long and complex sentences which can discourage the audience from your essay or novel. Unless your subject is something like "Nuances of thermonuclear fusion" avoid long and boring phrase and wording, though even is such narrow disciplines the simpler you can present it - the higher your own understanding.
So, just remember - make everything easier for all.

2. Using of the adverbs
I can't say much about that personally, but I have reviewed some articles on the web to find out what other authors tell about the impact of J.K. Rowling's art on their own experience. One thing I met more often than anything else ( in the technical meaning of writing) is that all those respondents were charmed with the usage of adverbs. Then I come up with the idea that adverbs can be considered as water as if they are too many - there would be a flood. Take them away and you will get a dry desert, finally pick the right place and right amount and your readers will get a garden full of roses which are marvelous because they were watered properly.

I can see now why Harry Potter is such a masterpiece, as this is a world of magic and charms, we meet nice and ugly creatures which appearance we can imagine but hardly get the whole feeling. With the adverbs, the author gives us the opportunity to sense everything clearly, build pictures in our mind with inner fulfillment. The importance of this part of speech is invaluable when describing such saturated and fantastic world. Yet this advice is a must regardless of the genre you are writing in. Even if you are an essay writer and work on a subject that is not related to literature or any other humanitarian theme don't hesitate to "water" the ground of the text. Even math becomes engaging when described with "colors and sounds". It's not that I encourage to make physics or engineering essay or dissertation writing less serious, but adverbs make papers live and that is always captivating.

3. Make value to the whole world, not only to the neighbors
Probably the most awesome thing about the Harry Potter story is that one can discuss its story with anyone around the whole planet. Found a friend online that lives on a different continent and don't know how to continue the conversation? Check if your friend likes or not the personality of Severus Snape instead of finding out his opinion on the local tax system. No doubts, you'll have a great chance to know each other better. The same you can do sitting in the airport, walking through the park and so on. No matter where you meet people, you can be totally sure you have topics for conversation in common. That is the power of creating content for all, not for a group of people limited by a fence, a city, country or professional skills. Boys and girls who live in a magic school and learn how to charm and make a spell, but more than that, how to become cleverer, smarter, more honest and to help a friend. This is what understand every kid, every teenager on both hemispheres of the earth.

Again, we can apply this rule to every situation, every subject and every person. You have a task to craft a music essay? Don't build fake walls, instead, try to extend your experience and deliver the content in a way it involves different points of view so that as many readers as possible could benefit from it. On the other hand, when students look for help, they can reach online assignment help who are capable of preparing top-notch papers of any kind.. Keeping in mind, these writers can be located somewhere on the map far from you, I am sure they developed certain skills in building content that is suitable for all.

It is easy to find more than 3 lessons from J.K. Rowling as she is a great writer who made the world better since her first book has been published. But here I just wanted to bring your attention to several eclectic yet extremely useful tips we can learn from the "mother" of Harry Potter.