Three More Questions (Let me know if these move beyond Noob).
* Is there any way to easily see the National Wonders of all my cities, including those cities that still have open slots for NW's?
* What ratio--roughly--should one aim for between cities and workers/work boats? Am I right that having more workers will help stave off starvation (producing more food)?
* How do you keep control of a city you have conquered? I keep finding that either the enemy's culture ends up surrounding and isolating the city, or takes over half its resource tile, or the city out and out revolts.
National Wonders: don't know that one
Work Boats get used up when you improve the water-borne resource, e.g.,
fish or crabs. One only needs to build enough work boats as you have
resource squares. If an enemy ship pillages the square, you will need to
build another work boat to rebuild the improvement.
Workers are not "used up"; there are different rules of thumb for the
number of workers to build. The smallest I've seen recommended is 1 / city,
and many experienced players recommend 1.5 or 2 / city. There are
periods where your need for tile improvements are greater than others --
in the early game, you need to build roads to link your cities, to build
resource improvements (e.g., farms, pastures, plantations), and to connect
these resources by roads. That need may diminish for a while, until you
have the ability to build railroads, when it will increase again.
Keep control: keeping troops stationed in a city will help suppress a revolt.
Building your own cultural improvements will help over time, and you may
need to switch to slavery and sacrifice population to build them quickly.
If you have a Great Artist lying around

, you can also send him/her to the
city and create a great work ... that works well, but is hard to do
repeatably.