It's Winter Restaurant Week(s) in Boston. I like being able to "shop" the menus online, decide which ones to go to, then use the OpenTable link in the directory of participants to reserve.

Then - and this I like all the time - when you're trying to find the time you want, the booking engine will tell you what before|after times are available if the one you want isn't open. In the case of the popular participants in Restaurant Week, OpenTable tells you when the next availability is. For Boston's top establishment (well, one of two five-stars), l'Espalier, I went on the hunt before Restaurant Week started, and found the earliest availability there to be March 24, mid-afternoon. Zip, zip, zip -- bagged. Not bad: a five-star for $20.09.

(BTW, FWIW, boy are they hurting. In prior years, I think something like ~50 restaurants participated. Last I heard, for this round it's ~240 in the metro area, and still growing.)