Traveling by subway may be an overpriced headache (especially on weekends!) but at least now you can use Google Maps to plan your treacherous trip through it. They've just improved their NYC subway system mapping in their "Transit" layer, making it easier to plot a subway commute to the address or neighborhood of your choice.
To activate it, point Google Maps to somewhere in NYC, click on the "More..." button at top-right, and select "Transit." You'll then see all the subway lines pop up on the map. When you click on any station name, a bubble pops up with the names of the lines that service the station, and all the other lines on the screen disappear like magic! Your move, MTA Trip Planner.