Garlick is hoping Berahino will serve as "an inspiration" to those players involved in the club's youth set-up.
Berahino has been warned, however, not to get carried away with the limelight he has suddenly found himself under this season.
Speaking to the club's official website, Garlick said: "It's difficult for any 20-year-old to get into a Premier League side and there are going to be times when Saido may not be playing as much as he would like to.
"He's not the finished article and he has to remain patient, as we do with him.
"But he has done exceptionally well to get where he is and he now has to focus on what got him here - hard work and keeping his feet on the ground."
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