If your eat like a mouse you are not going to gain, period!
If you avoid squats, deadlifts, and other compound movements, you are not going to gain.
If you don't get enough sleep, yup you guessed it no gains.
If most of your protein comes from shakes, well you already know.
You can detect right away those that are going to be shaky, and that will fall behind and those that are very hungry, and that hunger you will have to develop. You gotta create a goal for yourself whatever that may be, a short term goal and a long term goal and you gotta go after that. And if you donít see it, and if you donít believe it, who else will?