Reading books

Try reading books, in English of course, this way you're going to see how words are written. When you do this, try understanding complete sentences or paragraphs, do it with a dictionary, so if you don't know the meaning of a word you look for it inmmediatly for understand what the text is saying and for learn a new word's meaning. You could also have a paper, and go writting down there the new words you learned and its meaning in Spanish.

Some good ideas are to try reading the book in Spanish even if it's written in English, so you will be proving your level of vocabulary and how much you can understand, and when you can't understand something you look for it in the dictionary, but don't do it without it just in case you need to look for a word.

English music lyrics

If you listen music in English, this will help in different ways. Your vocabulary will increase, your pronunciation will be better because you'll be listening how words are pronounced and your audition will be clearer. You'll get used to listen fast things and after a few times, you will understand what they are saying, so when you're having a conversation it won't be hard for you understand if the other person speaks quickly.

You can also translate the songs, you will learn new words and its meaning and then when you listen the song again you will know what it's saying and you will understand it in an easier way. After doing this sometimes and having more vocabulary, you're going to understand without the necessity of translating.

Watch English movies and T.V programs

A good advice I can give you is to start watching movies and T.V programs in English, this will help you to reinforce your audition and even pronunciation. You can also use the subtitles so you will know the meaning of a word that you didn't know. You can start, if you want, with some child programs because the vocabulary it uses is not as advanced as a program to grown ups.

You will start noticing your advances, when you can understand more and more the things you watch, you will understand complete sentences and even complete conversations, not just words and that's one way you'll know you're progressing.