If you read something in english everyday, you'll improve your vocabulary =) I use: http://www.bbc.co.uk/learningenglish/ http://www.bbc.com/news/ http://edition.cnn.com/ http://www.nytimes.com/ and this app it is really good for words unknown, in just two clicks. https://chrome.google.com/webstore/detail/lingualy/iilcekgoelpgecpjnnoikhbleipnjdhf

Try using TED.com with subtitles! Highlight new vocabulary and ask someone about it or use a dictionary.

2000 most frequently use words list: http://bcnc3.weebly.com/uploads/6/6/5/2/6652960/2000_most_frequently_used_words_in_english_short_course.pdf

Use it or lose it ! This is the rule behind mastering any language.