Those pesky short pieces at the back are my hair arch enemies.
I totally agree on using a round brush back there as you dry. I use a medium size one and that seems to do the trick most of the time. If the hair back there is really short, then sometimes I'll just shape it using my hand as I dry it.
If its really stubborn, I'll use the flat iron to curl them down. The key to doing it is to put the iron right up against the scalp at the root if the hair and then twist the iron about 90 degrees down toward your neck - you'll feel the hair pull tight. When it's really short I'll let it sit a couple of seconds to curl it since there is no real hair to pull the iron through but as it grows out, I twist the iron and then slowly pull it through the hair to give a nice curl. It's kind of hard to explain with words but I've had my hair cut this way for awhile and thats what I've found works best with my wavy hair.