The Warriors currently sit top of the PRO12, edging Leinster by just a single point, but face a difficult run-in with games against Scarlets, Connacht and reigning champions Ospreys to come.
Fergus, now Business Development Manager with the Scotstoun-based club, told the Evening Times: "I believe there are three key qualities that Glasgow must get right during the final three-game run-in if we want to make history and go all the way towards a first-ever league title.
"First of all, our defence must continue to be one of the toughest in the RaboDirect PRO12 to breach. Second, we have to keep demonstrating real cutting edge when we get the opportunities in attack and finally our discipline must be exemplary.
"Particularly in respect of the latter, if you concede foolish penalties you can shoot yourself in the foot and also risk having players in the sin bin when it matters most. Decision-making also comes into it, but for me these are the three major requirements if we want to go all the way this season.
"Tick these three boxes and I think this Glasgow team can achieve what no other Glasgow team has done."