Auction House Tip

Buy usable items, such as weapons, armor and potions over the weekend and sell 'em during the week. The majority of players play mostly over the weekend and tend to dump all on the AH after a run or a crafting stint. This results in an overflow of looted and crafted items from Friday evening to Tuesday afternoons, really. (Some auction are placed for 48 hours on a Sunday afternoon / evening). A buyers market is created by an increase in supply is not the best time to sell your wares.

Wednesdays and Thursdays are optimal times for 48 hour auctions. It's when supply is lowest (everybody tends to hold back goods for weekend auctions that are larger) and profits highest, with the additional advantage of also covering the first wave of the weekend crowd logging in on Fridays. Contrary to popular opinion, on my server, I make my best profits through 48 hours auctions placed on Wednesdays.