@narciblog asked about better font support in SQL Developer. It appears I never noticed that Anti-Aliased is not the default. Here's a screen shot of the default that installs today.
Now, add 2 lines to the sqldeveloper.conf file
Then you get a much nicer looking font.
This is probably the quickest and easiest tip I've given so far.
The gory details are here : http://docs.oracle.com/javase/6/docs/technotes/guides/2d/flags.html#aaFonts