Just takes a lot of trial and error to figure things out in Sim City. Its really fun once you get used to it, and as long as you don't encounter annoying bugs etc. I actually focus on electronics to make money, then claim other cities and send myself money to start a fast and nice city.
Part 6 - Completing the Arcology
I continue working on the Arcology, and begin importing the last few materials I need to complete it, while trying to make as much money as I can. Eventually, I get all the materials needed, and increase my profit to 3-4 million per month!