A couple of years ago, if you played Kou-Jong in a pop out window while watching something on Z-Share, you could effectively stop the timer if you clicked on the Z-Share window while you were looking for a match. That seems to have been fixed, but the same thing happens with Loombo.
Came across this quite by chance, watching Castle on Loombo while trying to beat AAA's score on Kou Jong. I chose to play Kou Jong in the largest size possible (as this creates a pop out window) and then opened up a seperate window with Loombo on it. Resized Loombo window so I could watch Castle while playing. Whilst playing, if you click on to Loombo window and move the mouse cursor around the window, the Kou Jong timer stops. Now, this only saves you a few seconds as timer starts again as soon as you click back on to game window to make your move. However, through doing this I got a score of 919 just now and that was only using the above method on the first round. Could no doubt be used for trophy if done correctly.