Writing,that is to say,just as the painting,which can be apreciated or critized .If you want to have such a good writing ,you must practise everyday,and you have better to immitate by the good writing ,which can improve your writing effectively.
As for me,I think it is very important that you have some interest about it .This will make you train yourself willingly.As far as I am concered ,I like writing just as my teacher ,there was a time ,when I just a junior school stduent ,my teacher said ,good writing is helpful for us ,especially in the exam,the same question ,because of good writing ,which can get more.
So ,when you start to improve it ,you shuoud have a goal or intest.