Ran out of root partition disk space, help!

[LeperousDust]

I have 500Mb of space left on my root partition on my lappy install. I need to really squeeze some more space out of this somehow

Basically its a 20Gb partition, with Vista and "basic" program installs (over the space of about 2 years) but i've completely cleaned it all, and i've hit a space wall... My other home partition is pretty full too, 3.xGb of about 120Gb and thats been parred down to necessities barring some recent stray downloads

So what can i get away with deleting from system folders to save space? There must be crap there i don't need? Also if i make some room on my other partition, no-one would advise me to re jig partitions would they? Disaster waiting to happen right?

Before anyone mentions it, no i can't be bothered with the hassle of a format, the computer works amazingly perfectly well, it just has some extra fat and it needs a simple tummy tuck, far too much hassle installing and getting everything "just right" again...