Oh wow. I have lots of bad habits. Lol.
Let's see here...
For one, I can manage to burn just about anything, when cooking. Even those microwaveable macaroni things that my little brother can make without a second thought, big bro comes in and the place starts to smell funky, if you catch what I mean. Now, this isn't to say I CAN'T cook, however, because I can, WHEN I'M PAYING ATTENTION. Problem is, I almost never pay attention, because I tend to phase out randomly a lot.
Another bad habit of mine is drinking wayyyy too much soda than is good for one. I've been trying to lighten up recently, but, hah. Yeah...
I bite my nails sometimes too, but I've been keeping them trimmed extremely, extremely short so I can't...not that I had long, long nails anyways, but I could obviously bite them. Now I can't. As long as they're this short I guess I'm good, heh.

Hmm... bite my nails... no matter how long they are. Listening to Metal all the time (almost) ... I've even had metal on while I've slept

Another one in biting my lips. I don't even know why I started... And drinking more soda a day than it should by allowed to (which is sometimes up to 4,5l ><")

When the tip of my nose is cold, I wrinkle my nose and poke it all the time. To grimace is a bad habit. I think I will get earlier than other people wrinkles around the nose and my mouth.

Than you better should try to keep your nose warm...

Tyrant Heart

I got the habit to be late for lots of things. Only when it's an official occasion, then I'm always too early.

I feel always guilty when I contradict somebody.

I on the other hand am always early and I always have everything with me and I only very rarely lose something.
I guess it is just that I am trying to make up for being born a few days later than expected

Picking my nose, farting and burping......

World of warcraft, and really bad spelling

It is not a habit, it is a lifestyle