Great advice so far.....
.Also i played a small map and had 2 planets.When i had built things i wanted to at full capacity...ie all the planets had things built on them there was no more space for anything else.A pop up came up all the time saying Idol Colony.I was a bit miffed about that,i didnt know what it was trying to tell me.
Like in many 4x games when a town/city/planet can no longer build buildings there is usually some sort of generic option such as generating money, science, etc. In GCIII you can do this as well. In the same part of the screen where you click buildings look at its stop. You should see the word "project." Click that and you will be given options to build a shipyard, and depending on your tech level there will be research, credits, influence, and birthing subsidies. I'm probably missing one. Anyway you can click one of those and the planet will no longer be idle and instead gain the bonus of whichever 'project' you chose.
