Edited on 1-21-2013
One thing that pops up in world chat sometimes is "how do I get a second city?"
Well really the only way to get a second city is by buying the deed to a second city, which costs 250 pearls, or by getting lucky in the chance chests or if you get 100 artifacts.
Getting a second city will double your income potential, double your army training facilities and double your research facilities!
Try to build your second city as close to your main as possible. It seems tempting to build it far away but it makes it much harder to defend either city. If your being overwhelmed by attacks it may be wise to teleport your main city and then build a second as close as possible. It'll slow down if not stop the attacks and during the time of calm you can use that momentum to really get your second city building. You may want to try to move closer to an alliance member you isn't really being attacked too much if you want peace. But a stronger alliance member may offer much more protection.