Nowadays it is no longer difficult to improve oneself in every area. Wth the use of internet you will not have to spend money buying learning materials like books, dictionaries and encyclopedias. You just have to be friends with google and google will lead you to what you need. There are even sites wherein you can test how bad or good your grammar is and also how to improve it. There is a lot of reading materials to spend your vacant time with and also communicate with english speaking people.