What do you do when you're bored? (Istanbul)

I am not sure if I am just exhausted by end of the year or because it is getting colder and colder everyday, but I start feeling bored more these days.

Bored not because nothing to do, but because there are lots of things to do which I don't want to do and nothing is interesting to me anymore.

What do you do when you feel bored?? Recommend to me something interesting that could cheer me up perhaps.

P.S. Recommending to attend IN events shouldn't be an option as that's not interesting to me right now either. On IN events lately I started feeling that everyone ask the same question over and over again, how could that be interesting? Anyway...please recommend.