A rule of thumb is that your swap should be about twice your ram. I tend to use 1gb of swap, sometimes 512 on certain machines.
I'd recommend that, if you don't know what sizes to use, then just do ~1gb swap, and the rest /. Once you get used to where you use the most space, you can worry about partitions.
Just FYI, this is what I did:
Filesystem Size Used Avail Use% Mounted on
/dev/hda1 7.3G 1.6G 5.4G 23% /
/dev/hda2 7.3G 366M 6.5G 6% /usr/local
/dev/hda3 35G 7.4G 26G 23% /home
/dev/hda5 23G 17G 5.7G 75% /vmware
tmpfs 252M 0 252M 0% /dev/shm
I found that I was using far more space in /home than anywhere else, so it was logical to give it more room.
