Press alt+21 ingame to open the console.
Then type in the following codes.
Ai will always respond favorably to a request (to each other also): yesmen
buildings finish in one day: instantconstruction

Gives you a lot of money: cash
Gives you a lot of prestige: prestige
Gives you an amount of goods, including money: goods
Gives you officer points, you can recruit as many as you want leadership research finish in one day: instantresearch
Sets the countries plurality: plurality