I don't know about you, but I'm gonna put on some makeup, wade through my precious swarm of shelter-rescued kitty-cats and this time I'm gonna find a real man (just like I do every time my phone psychic tells me). Wish me luck!
You should do something constructive, like study about something you don't know, or learn a new skill. Or you could do something for others, like volunteer at a charity.
Random ideas might include: ice skating, mini golf, go to the movies, go out to a bar, pick out a recipe from a cookbook and try something new at home.
I think you should find a hobby that you can always turn to whenever you don't have other plans. Maybe painting, sculpting clay; repairing a car, knitting, whatever. I never understand when people say they have nothing to do... i never have time to do all that i want!
Well, if you're going to be staying up late, I recommend the new Batman movie, but that's only if you're the kind of person who is okay starting their evening's activities after midnight.