Where does OS X store USB mouse plist? I've found that often when you are experiencing trouble with a peripheral, deleting the plist file can often fix the problem.
My USB mouse has been sticking/freezing for a second at a time lately.
I've looked throughout ~/Library/Preferences/, but saw no filenames that make me confident enough to delete any of them.
UPDATE
I was able to delete the com.apple.driver.AppleHIDMouse.plist file that was showing in the Terminal but not in the Finder.
Pauls-iMac: soliddev$ ls ~/Library/Preferences/ | grep driver
com.apple.driver.AppleBluetoothMultitouch.mouse.plist
com.apple.driver.AppleBluetoothMultitouch.trackpad.plist
com.apple.driver.AppleHIDMouse.plist
Pauls-iMac: soliddev$ rm ~/Library/Preferences/com.apple.driver.AppleHIDMouse.plist
Pauls-iMac: soliddev$ ls ~/Library/Preferences/ | grep driver
com.apple.driver.AppleBluetoothMultitouch.mouse.plist
com.apple.driver.AppleBluetoothMultitouch.trackpad.plist
Pauls-iMac: soliddev$

Unfortunately, the mouse sticking/freezing persists.
UPDATE
At the end of the day, I've bought a new mouse, the problem seems to be fixed for now. Thanks for the help.
The tracking speed is stored in the  ~/Library/Preferences/.GlobalPreferences.plist file.

defaults read -g | grep mouse
"com.apple.mouse.doubleClickThreshold" = "1.1";
"com.apple.mouse.scaling" = "2.5";


The slowest speed shown in System Preferences is 0.0 and the highest is 3.0

You can change the speed by editing the plist directly or with defaults, but you have to log out and back in.

defaults write -g com.apple.mouse.scaling -float 2.1


This AppleScript code would change the speed immediately:

tell application "System Preferences"
    reveal pane "com.apple.preference.mouse"
end tell
tell application "System Events" to tell process "System Preferences"
    set value of slider 3 of window 1 to 9.0 -- maximum, minimum is 0.0
end tell
quit application "System Preferences"


EDIT: 
    defaults find mouse
will search your default domains, keys, and values for the word mouse, without the need to pipe to grep.