#1: Holloway picks the perfect time to recall Shittu
Danny Shittu told Ian Holloway weeks ago that he was fit and ready to return to action.
Holloway, though, kept him waiting on the bench. The Lions boss did consider starting the big defender at Wigan in midweek but had second thoughts.
“A wet Tuesday night or a game in front of the cameras?” was Holloway’s dilemma, and in choosing the latter he made the right decision.
Because Shittu has always risen to the occasion. In 2013, he scored in a televised FA Cup tie at Blackburn to send Millwall to the semi-finals.
So Holloway wound Shittu up just the right amount before unleashing him on the big stage, knowing he would relish the chance to send out a message.
And Shittu did just that with his performance in both boxes.
He leapt two feet above Cardiff’s Federico Macheda to head in the winning goal but was equally formidable at the other end of the field.
Defensively, he made nine clearances, one tackle and one interception.
There was one nervy moment when Shittu slipped and the crowd held its collective breath as the ball deflected off his flailing arm, but the danger quickly passed.
The 34-year-old’s future at the club looked far from certain in the summer but this display has re-established him in Millwall’s first-team picture.
#2: Missed chances shouldn’t deter impressive Gregory
When the final whistle blew on Saturday, all of Millwall’s players, bar one, punched the air in jubilation.
But Lee Gregory’s head was bowed for a moment as he reflected on two missed chances in front of goal.
Later he tweeted that he was “gutted” not to have got his name on the scoresheet.
But Gregory, who eventually joined his teammates in celebrating a vital win, should not dwell on what might have been for long.
The striker lobbed one narrowly over the bar before firing wide after a rebound came to him quickly but his overall performance was encouraging once again.
With Gregory running in behind opposition defences, Millwall have posed much more of an attacking threat in recent weeks.
He impressed again with his movement but also with some neat one-touch passes and flicks in tight areas to link the play.
The striker will rue his loose finishing but this was another step forward for a player who last season was plying his trade in non-league.
He’s already scored twice for the Lions and if keeps getting into dangerous positions, he will score a lot more than that.
#3: Shaun Williams finds his killer pass
He’s arguably been Millwall’s most consistent performer this season, but Shaun Williams has shown in his last two games that he can step up another level.
Always neat and tidy, always reliable with the ball and always trustworthy in possession, Williams is the ideal deep-lying midfielder.
But occasionally he has shied away from the blockbuster pass or the Hollywood through ball.
In August, Holloway backed Williams for an Ireland call up, but added: “He’s got to play more like a midfielder than a centre half.
“Nicky Bailey plays like a midfielder doing defensive duties but Willo has been a centre half for the last two years.
“Part of being a midfielder is creating and I'm expecting him to do that more. He’s got a range of passing that nobody has seen yet.”
Well, we’ve seen it now. Against Wolves, Williams floated a wonderful chip into the path of Lee Gregory, who calmly finished into the bottom corner.
The duo almost repeated the feat at the weekend as the midfielder’s raking 40-yard through ball found the striker before he lofted his shot onto the roof of the net.
Williams has always had that killer pass in his locker but with Gregory hanging on the shoulder of the last defender, he now has someone to aim for.
His stats against Cardiff? 68 touches of the ball, 53 passes and an 83% accuracy rate. Not bad at all.
#4: Lions hunt the ball down in packs
Millwall’s pressing game was back to its best against Cardiff. The Lions closed the ball down in numbers but they never lost their shape or became ragged.
Lee Martin and Scott McDonald led by example again, displaying seemingly boundless energy to win possession back nine times between them.
Millwall’s best performances and results this season have come when they’ve chased the opposition inside their own half and forced mistakes.
They did it brilliantly against Leeds and Fulham in August but let things slip during September.
There was little bite or purpose to their pressing at Ipswich or Huddersfield.
So far, the Lions have only turned this on in the big games. But they need to use the same tactic against the sides around them in the league.
#5: Forde save was as important as a goal
This incredible double stop from David Forde deserves a special mention – it was just as important as Shittu's winning goal.