Maximum Download Speed is 60Kbps only

I am having a very slow internet connection. The speed is just 330Kbps which is really slow. But this is a plan from my ISP since this is what I can just afford to pay. My problem is when I am trying to download anything, the maximum speed is just 60Kbps only. And it sometimes drop to 20Kbps.
How do I speed my downloads up? Sorry, I'm no expert when it comes to stuff like these. So kindly explain the technical stuff. Thanks all!
