I myself listen to music then I try to find new words and repeat them in my mind. I can easily memorize them because they're musical. Another way is that you can read stories, articles, etc or watch news or useful English programs more because there are some words that you face them several times so that you can remind and memorize them. You should check the meaning of all words you see for the first time,too. Try them; to me they were good solutions for this problem as an English student.

Don't memorise - just keep in contact with the language every day. Day by day, more will sink in.

Me too! Vocabulary of English is so polysemantic that makes really sick of trying to understand what does a word mean in an context. Also many words may be nouns, adverbs or verbs depending on an aticle or preposition. Also phrasal verbs are also a piece of hell. So many grammar things in English are quite complicated and illogical. So you always need only swot up and swot up! I really HATE such kind of learning and I absolutely HATE English!

I also hate to memorize the vocabulary. In that case I have learnt tense and modal verbs and its uses (Both in mother tongue and English). It helps me to feel the English sentences. And I can do it when I feel it. This book may help. <<Oxford Modern English Grammar>> (Bas Aarts)

Listen to music and watch youtube/TV/movies in english (w/ subtitles if you can). Try to figure out what a word means from its context first, and then look it up if you still can't figure it out. Good luck!