Besides common advice like listening to music, watching movies and using flash cards in your target language (which are all very good!), here are some tips that are a bit more unsual but very effective. These are things that I did when I was teaching myself English, and I am also doing them now that I am teaching myself French. Once you start being more in contact with the language, you are going to love the way it sounds and the kind of things you will be able to say.