A small trick for adjusting a window. Click and hold the titlebar. Than with one finger swipe the titlebar to the top of your screen. You will see a slightly darkened window. If you release your mouse/touchpad the window will fill the window to it’s maximum (like clicking on the green + radio-button).
If you the same but then from the top to down, the window restores to it’s previous size (mostly smaller).
Another small but new feature of Snow Leopard is minimising open application windows to their respective ‘application icon’ in the dock (instead of a new icon on the right hand side of the dock). Not bad!