I've forgotten which component is under which paper, but here goes.
For listening, you need to be familiar with English. Reading alone wouldn't help much if you don't get the pronunciation right. Listen more to English news, radio stations, or just watch more English TV programs would help. Also, you need to be able to process the information heard, so it's not just about listening, but understanding.
For speaking, I can't possibly give a lot of methods here because for me, since my first language is English and I've been public speaking and debating since Form Four, speaking in English comes naturally to me. But the thing is, ideas are important. Within the preparation time, organize your ideas so that it is smooth flowing. Try to understand the ideas and not memorize them, as with understanding, one could build a ten minute speech if required to.
For comprehension, that is a test of understanding. It's something like listening, but it's text based. So basically, read more, try to understand what is being read instead of just reading for the sake of reading. Ask self questions, and try to answer them. Be analytical about the things read, and all should be fine.
For writing, ideas are required, so read more and keep up to date with current issues help a lot. Also, practise organization of ideas, be analytical, and try to see that the analysis interconnects with each other. Put that into writing, and it should be fine.
"For I dipt into the future, far as Human eye could see, saw the Vision of the World, and all the wonder that could be..." - Alfred Tennyson