Go play some Sleeping Dogs. It's a great game in and of itself, not to mention that it's perfect as a break from XCOM when the strategizing gets to heavy. Just take some time to enjoy the great atmosphere and cool characters of SD in stead. I've done all that I feel like doing in that game (most side missions except for some grindy stuff), and I really hope they make some more quality story DLC.
I have only played XCOM for a few hours and I love it, but I plan on taking my time and playing it in smaller chunks. I think it will be more enjoyable that way.