If you don't take your chances when on top, don't be surprised if the opposition come back and defeat you.
That's what Dundee had to face up to following yesterday's Scottish Premiership encounter against Hearts.
The Dens manager, Paul Hartley, conceded in the BBC Alba television interview afterwards, that his side should have been enjoying a comfortable lead at half-time.
Instead, they were only 1-0 up thanks to Kane Hemmings' early header.
Hearts did have their chances as well but the first half was Dundee's.
And that's precisely what Hearts - and Spanish striker Juanma in particular - did.
The Edinburgh side played much better in the second half and deserved their victory.
While their goalscoring feats were the main object of focus from last season's promotion-winning campaign, their resolve was not far behind - the seven points they took off Rangers being the main examples.
That was in evidence yesterday as it wasn't that long ago that Hearts under Gary Locke would have folded after going a goal down so early in the game.
In fact, that's what Gary Locke's Kilmarnock side did do during the previous week's thumping at the hands of Dundee.
Hearts hung in there and regrouped at half-time in order to pose a sterner challenge in the second-half.
However, this is not to say the Gorgie side are entirely exempt from criticism - despite the victory.
This blog before the season started spoke of the need for Hearts boss, Robbie Neilson, to know when to adapt and have a plan B in place should plan A be neutered by the opposition. http://mattleslie74.weebly.com/blog/consolidation-will-be-first-and-foremost
However, with regard to 'switching plans', there is a reason why A comes before B in the alphabet.
There were raised eyebrows when Hearts' Twitter feed informed those following it before kick off that Neilson had changed the formation to 4-4-2 from the usual 4-2-3-1 with captain and centre-half Alim Ozturk playing in the holding midfielder's role.
Playing a defender further up the park has been done before by a Hearts manager.
In a European Cup-Winners' Cup tie against Red Star Belgrade in 1996, Jim Jefferies asked this of Pasquale Bruno in order to keep Dejan Stankovic quiet.
It worked, even though Hearts went out on away goals, as Stankovic was anonymous throughout.
However, Bruno later remarked that he hated the experience - despite being Hearts best performer that night.
Ozturk yesterday clearly looked uneasy in his new role.
Plan B's are all well and good but surely they must only be implemented if plan A fails?
At Dens Park yesterday, B came before A and the former flopped.
Credit to Neilson that he realised that his strategy had not come off and he reverted back to 4-2-3-1 with Ozturk moving back in defence, Igor Rossi moving sideways at left-back (which he has history of in his career) while new signing Juwon Oshinawa moved into left-midfield (again, someone who can do both roles).
Ozturk is a player who can do one role - and he does it well. So asking this of him was not a wise move.
But Neilson did see that he had made a mistake and corrected it. His two predecessors in the Hearts dugout would have stubbornly stuck with their original gameplan and let the Jambos slide to defeat.
Hearts - and Ozturk - look revitalised having gone back to the tried and trusted method and duly took control of the game.
Juanma in particular was impressive. The goals will be focussed on by many but his first touch and all-round play was exceptional and he looks to be another feather in the cap of Director of Football Craig Levein's scouting system.
Mongaro Gomis found the form he had shown last season and controlled the midfield. This in turn freed up Prince Buaben - his hunting of the ball that allowed Juanma to score his excellent second goal was impressive.
Special mention must also go to new signing Błażej Augustyn.
Having received a rude awakening in the previous week's thrilling 4-3 victory against St Johnstone, the Pole quickly realised that the Scottish game is played at a faster pace than he had experienced in the past.
He looked far more comfortable at Dens Park and, like Juanma, is shaping up to be another bargain buy.
Same for Oshinawa. On his debut (and not yet match fit) he gradually became accustomed to the pace of the game and showed signs as to why his arrival had all the hype in the first place.
The Nigerian's arrival looks like being curtains for Kevin McHattie - it would appear patience is finally running out.
Two years ago, his dreadful display in the League Cup final loss against St Mirren (a left-back who keeps drifting into the centre-half position is a liability, not a help) was put down to 'inexperience'.
He looks good going forward but his bread and butter should be the left-side of defence.
Mistakes being made two years ago have not been corrected by the player and following his apparently poor show in the League Cup win against Arbroath recently, Neilson looks to have had enough.
The fact he felt compelled to sign Oshinawa might well be interpreted as 'creating competition' in the left-back position.
But when the Hearts manager would rather move Igor Rossi from centre-half to left-back when he needs alternative cover, that is a clear sign that McHattie's role at Tynecastle is on a shoogly peg.
At worst, for him, Hearts may choose to let him go (after all Adam Eckersley was released and he had had a very good season). At best, he may be loaned out. If it's the latter, McHattie will be in the last-chance saloon.
Still, such problems for the manager are a luxury to have. It wasn't that long ago that the team was picking itself by default.
As for those who were hinting that Hearts - after only two games remember - could challenge for second place, step back and breathe in a little.
It's early days and some of us remember a flying start to season 1998/99 only to go into Easter weekend having to beat Dunfermline in order to secure top-flight survival.
Come the first quarter of the season, we will know how good this Hearts team might be.
And if Juanma still has his shooting boots on, Hearts will be taking significant steps on the road to recovery, following the much-publicised near-ruin of the club not so long ago.