Tips:

Tip 1:

Keep a large money reserve while building Wonders, just in case you have to finish a building in a hurry to beat other players. Disbanding units in the city that is building the Wonder can be a last-minute boost toward completion.

Tip 2:

If you do not build the Great Library or its equivalent in a modified scenario, be very careful about giving technology to your friends because you will be giving it to the owner of the library as well.

Tip 3:

In all human games, don't bother building the diplomacy-affecting Wonders such as the Great Wall or the Statue of Liberty