One good way to help improve your pronunciation is to record yourself talking it play it back. Listening to it this way can help you find problems with your pronunciation that you don't hear when you're speaking. Reading is a good way to improve vocabulary. When you're learning new words, be sure to take the time to practice using them in sentences. This helps take them from a word you know to a word you can use. One good way to improve your speaking ability is to learn about something that interests you. If you have a hobby of some sort, learn to speak about it in English. As you're already interested in it, you will have some existing motivation to learn about it and it will also give you the benefit of always having something to talk about in a general conversation other than the "Hi." "How are you?" "Nice to meet you." etc. Most importantly: practice, practice, practice. It takes time to build up confidence and get the handle on general conversational flow.

As with everything, you will just need practice. Learn a song to improve pronunciation. Talk about things that you're knowledgeable about with an English-speaking partner. Take your time!