One of my least favourite things to do is accidental disenchantment. It sounds hard - after all, you have to click on the Disenchant skill, then an item you're probably wearing - but after disenchanting several items in a row and then deciding to enchant a worn item, it's all too easy to click Disenchant by mistake. This happened to me, yesterday, for the second time; I disenchanted my tier 0.5 bracers rather than giving them a stamina enchant.
Should this happen to you, don't worry -- it's not the end of the world. You can get the item restored, though the European GM I spoke to warned me that this process was only available once per account. Knowing that I'll be getting some better gear very soon, I decided not to choose this option, but since the tier 0.5 quests are non-repeatable I'm stuck in tier 0 for the time being. I'm happy it was only the bracers, which are blue, and not any of my epic items -- I'd have a hard time deciding whether epics today were more or less valuable than epics I might get tomorrow.
Have you ever danced the disenchant tango? Had any other moments of regret? All I've learnt from this story is to install a "safe disenchanter" addon, and to be doubly careful when playing late at night.