slackware

I've decided to try slackware because I just got a new box. It's got a 40gb hdd; what is a good way to partition it? I was going to create separate partitions for swap, /home and /usr aside from the bootable partition, but I'm not sure what sizes to make them. What is a good distribution of hdd space?

My friend explained Swap to me in the best way: the more swap you have, the faster your computer is. I suggest 15GB swap, anything more and you dont get much benefit.