Setting Up My D-Link DIR655, Something Wrong With The Speed

Hey, I was just wondering if there's anything I should be tweaking on the router settings page to get the best performance out of this router. I did the thing with the cd to set it up and everything but I'm not sure If I have to do anything in the settings page. On the network is 2 computers which are both wired (1 is my main computer, another just for gaming now and then), my xbox360 which is wired, and my nintendo wii which is wireless, I also plan on using bittorrent on my main computer. So does anyone have any tips on how I can tweak this router to get the absolute best out of it?

Edit: I'm only getting 2500kbps on speed tests, I'm not doing something right, anyone?