Bad habit: laziness
Too often I will have all kinds of plans for a day, you know, productive plans. Then the day will come and I'll say, "Eh. Nah, no thanks. I don't feel like doing that." So then I laze around the rest of the day and then that night I say to myself, "I just wasted that entire stupid day!" This is a viscous cycle that I have a hard time getting out of.