Timers I use most

                                                       Timers you must use

Here are some timers you must get:
Stackmat, you can buy it at : http://www.speedstacks.com/store/retail/competition-timer-with-bag.php
CCT timer, download it at: http://cube.garron.us/cct/
Cubemania, online have to register to use: http://cubemania.org/