This is the method to learn!
It can be difficult to get away from the Punnett Squares you are probaly very familiar with but this is an easier and quicker method. There is a trihybrid cross example provided so this makes this method the logical choice as it is faster and you are less likely to make a mistake so gain some confidence and use this method.
Link to the "Easy" Version: https://youtu.be/UZAqUs_j0vs
Link to Lecture Slides: https://drive.google.com/open?id=1LTHXmdp-ySINRITwuJHfUqirVAma5JCr
*Due to the description character limit the full work cited for "Forked Line Method" can be viewed at... https://drive.google.com/open?id=1BpsHOVPceBcfHaE1Ugsoj4jKL0sNVilh