Are you sure you want to be doing the subject you are doing? Can you connect these daily goals to something bigger you want to achieve?

My second question would be do you have study skills. Not lecturing but if you were one of those scrape-by-on-a-last-minute-clever-remark people in high school it might be worth looking into. It takes a lot more motivation to do something you're not already practiced at doing, because you have to study, and figure out HOW to study all at once!

Are you addicted to anything other than schoolwork? (TV, computer games, online poker?) Maybe study in the library so that it's not as tempting. I try to turn of my internet when I'm writing, not always successfully, but it's less distracting...

Finally if you think you might be depressed or have ADD it might be worth getting it checked out. You sound intelligent, reflective, and like at some level very frustrated by not being able to be "responsible" so I hope that you can call on some other people to help get this figured out! Good luck.