More to be added as I find them or you guys submit them!
Insert any of these lines anywhere in your build.prop file located in /system and reboot.
Disable error checking. Gives a nice speed boost.
This one sets the max framerate of the system to 240 fps. (Well beyond the screen's ability to render. I did notice a nice difference in smoothness.)
This one does nothing for performance, but does remove the USB debugging icon. (USB Debugging is not disabled)
All of the above tweaks will work on any device. Though I should mention that windowsmgr should be set to 60 or 120 on non dual core devices depending on the age of the device.
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The tweaks below apply to the Galaxy Nexus Only CDMA/GSM
This will remove software (CPU) rendering and use full PowerVR SGX 540 (GPU) rendering

Insert any of these lines anywhere in your build.prop file located in /system and reboot.
Disable error checking. Gives a nice speed boost.
Code:
<br />
ro.kernel.android.checkjni=0<br />
Code:
<br />
windowsmgr.max_events_per_sec=240<br />
Code:
<br />
persist.adb.notify=0<br />
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The tweaks below apply to the Galaxy Nexus Only CDMA/GSM
This will remove software (CPU) rendering and use full PowerVR SGX 540 (GPU) rendering
Code:
<br />
Remove first line from egl.cfg and remove libGLES_android.so library. which are located in /system/lib/egl/<br />