For my birthday, last year, the F was kind enough to purchase a cute android tablet. Since law school, my laptop had taken a turn for the worse and since I no longer required full computing power, the tablet was perfect. Also perfect: the vast number of apps available to me, including the Open Table app.
Never has a more convenient tool existed, in my opinion (but that's probably because I love to eat). Booking reservations couldn't be easier, particularly at the last minute, and it gives me access to reviews and menus before I book a table. I LOVE IT and if you love food and haven't tried it, then I recommend it.