'Incorrect' is perhaps a strong term, but my experience over the last few years has been that making a lot of partitions tends to be a mistake -- specifically, later on, I'll want
/var or what-have-you to contain more bytes than the partition size permits, which results in a big pain in the neck no matter how it's solved. I've lost track of how many times I've needed to do this, and it just never gets any easier.
This being the case, unless you've got a really strong reason to do otherwise (or you just really love doing sysadmin work, which I did until I'd had my fill of it), I'd recommend simply making one big
/ partition on the disk, along with a swap partition if you feel the need for one. (I've lately been just swapping to a file; see 9.2 here for how that's done. You might need to add the
swapon command there to
/etc/rc.local or some similarly suitable place to ensure it persists across boots.)
Granted there's a slight additional risk here that
/home will grow too large and starve the system, or similar, but as long as you keep a decent eye on how much space you're using, you shouldn't need to worry too hard on that score -- and the additional convenience of not having to, for example, periodically transfer
/var to another disk, mess with
/etc/fstab, and reboot, far outweighs the slight risk in my experience.