Don't assume that each nail will be the exact same length. (petsprinciple.com)
To gain more muscle you need to be overloading your muscles, if you have been doing the same weight, same intensity, same length of exercise and even the same exercises then it is time to change it: (fitbodyhq.com)
student BOR... a few inputs to evaluate 1) in general I like them... 2) make it simple, shorter, YB style 1 - 10 no a. b; each one about same length 3) just like YB did, have number to call as number 10 (epsweb.org)