1 - Don't Open Borders unless REALLY necessary
2 - Don't make Defensive Pacts with the AI. Ever.
3 - Don't go for a Diplomacy win without a bag of cash
4 - Don't be nice after you are called a warmonger. They now hate you forever, so you might as well kill them all
5 - Don't trust the AI on spying: they will always spy on you even if they promise not to!
6 - Don't ignore CS quests. They give you and ALLY with BENEFITS
7 - Don't forget to have an army ready to roll. Diplomacy doesn't always work!
Add to the list of you can think of something else!
2 - Don't make Defensive Pacts with the AI. Ever.
3 - Don't go for a Diplomacy win without a bag of cash
4 - Don't be nice after you are called a warmonger. They now hate you forever, so you might as well kill them all
5 - Don't trust the AI on spying: they will always spy on you even if they promise not to!
6 - Don't ignore CS quests. They give you and ALLY with BENEFITS
7 - Don't forget to have an army ready to roll. Diplomacy doesn't always work!
Add to the list of you can think of something else!