Hold [Shift] and type "1234567890". Cheat mode allows you to view the power chart, enemy cities and instant replay. It also allows you to fortify units, rearrange resources and sell improvements.

Press [Shift] + 5 + 6 during game. Then select any location on map.

Press [Alt] + R during game to generate leaders with random attributes.

(Note: This cheat could make the enemy stronger.)

Move all but one unit. Save the game. Quit the game. Then reload saved game to start your turn from position of last moved unit.

To move a non-water unit over large seas in one turn, build several transports. Set the transports in a chain (as far apart as they can go while reaching each other in one turn). load a unit (or more) on the transport one one end of the chain. take that transport to the next transport. Click on the 2nd transport and take it to the next transport and do the same precedure until you reach the desired shore.