wasted day again >.<.

I wonder why it is so difficult for me to study on Saturdays :(. Like, I'd wake up late, have late breakfast, use the computer, have late lunch, then when I wanna study I'd feel sleepy so I'd take a supposed-to-be-one-hour-but-ends-up-to-be-four-hour nap, then when I wake up it'd be dinner time and the whole day is gone just like that -.-. I think I need to get out of my house.