What would you have done?

[Gothbogg the Ripper]

I personally would have fashioned for one of the 9 wraiths armour that looked exactly like mine (Sauron) and sent him out to battle looking exactly like me.
This would make the opponents believe that the quest had failed and the ring had been captured, the mere sight of a wraith looking exactly like Sauron would make most enemies flee.

[Fingolfin II]

A novel idea, Gothbogg. Personally, I would have studied Middle-Earth and it's inhabitants comprehensively while my power was regrouping, thus I would have more knowledge of Hobbits and the Shire. Also, I would have done what SpM and Gandalf suggested- fortify Mordor (especially Orodruin) so that nobody could enter and 'bend all his [my] guile' to the finding of the Ring. Also, a Ringwraith protecting Mount Doom wouldn't go amiss either.

[Boromir88]

Now if I was the "movie" Sauron, I would have definately called in the ghostbusters to deal with that dratted Green Slime/Dead Army, Aragorn summoned.

[Zebedee]

More discipline in the orc army. None of this nonsense about various units killing each other off.
Also, not clear the steps to Mount Doom, make it harder to climb.
Perhaps make use of the barrow wights to attack the Shire.

[gorthaur_cruel]

I would've made mithril armor for my Nazguls, first of all. Sauron had a wealth of mithril:

Of what they brought to light the Orcs have gathered nearly all, and given it in tribute to Sauron, who covets it

Mithril armor would've meant that Merry's knife wouldn't have pierced the Witch King.

Also, let's face it: would you guys really have concentrated more on defending Mordor? You've got all the entrances into Mordor covered: Minas Morgul's defended by thousands of Orcs. The Black Gate's defended by thousands of Orcs. Cirith Ungol's defended by Shelob (whom nobody ever got past yet) and Orcs. He knows the limit of the armies against him. Why should he go on to strengthen his defences more when there was clearly nobody strong enough to attack him? I think Sauron didn't have much flaws in his strategy. His "mistakes" are natural mistakes, IMO.

[Elessar Telcontar]

I would have not given in to temptation and pride by emptying Mordor against the newly arisen King of Gondor. Surely emptying his his lands when the ring had yet to be found was foolish especially considering he knew it was not in the hands of Elessar, Gandalf etc.
In many ways Sauron caused his own demise by allowing himself to be fooled into letting his armies go into open battle at the Black Gate. In short Sauron should have believed his own weaknesses and ignored his pride...

[Gothbogg the Ripper]

I certainly agree with that, his pride did cloud his judgement when he sent out his army to face Aragorn and the others at the Black Gate, if he didn't do this it could have turned out very different.