There are lots of things to do in order to improve your English:
- Read a book every couple of months (many libraries have books in English)
- Read a newspaper or magazine about a subject that interests you (there are plenty online)
- Do a listening activity every day (or listen to a song paying attention to the lyrics)
- Follow a tv series in English
- Watch a film in the original version at least once a month
- Listen to or watch a news report in English at least once a week
- Find yourself a language exchange or a penpal. There are some websites where you can do that like conversationexchange.com or lingobongo.com
- Read out loud and look up the pronunciation of new words
- Use the internet: try some of the links on the previous page
- Record yourself speaking in English, then play it back and listen to yourself.