I just learned of a very handy tool for the Mac called Cinch. What Cinch does is replicate the function in Windows 7 called Snap, which allows the user to drag a window to the side of the screen, and the window automatically snaps to that side of the screen. In addition to that, dragging a window to the top of the screen automatically maximizes that window to fill the entire screen. The maximize ability alone is worth the $7 price of the Cinch tool.
In my opinion, the number one most glaring omission on Mac OS X is the lack of a true maximize button. As a former Windows user, I’ve always found this puzzling and odd. Fortunately, that issue is eliminated with Cinch. Try it now. I absolutely love it.