Here is a decent explation about the all important Circle of Fifths:
http://en.wikipedia.org/wiki/Circle_of_fifths and if you look at the bottom of the circle you'll find F# and Gb.
Last turn I started irragating the wheat and switched to IW at 20% for F#. For Gb, I moved the worker to the bg, and renamed my city to "Flight ofthe Bumble Bee" (ofthe is the way it is due to the amount of space I had)