Wear a toga without looking like an idiot. I mean, really, its a pretty simple garment, what gives? Perhaps its the cloth, perhaps its our build, perhaps we really don't know what toga's were like. Perhaps we are idiots.
Or maybe all the Greeks and Romans looked like idiots. That's possible, but I find it hard to believe since the did so much ass kicking for so many years, centuries really. The Spartans kicked everyone's ass for like 400 years, and the Romans did a fair job at it for 700 years (neither of which are small feats).
Of course that may be why their statues have them naked all the time, the toga made them look like idiots and they took them off to fight!