How can I get rid of my laziness?

I am lazy. I am very aware of the problem and try to talk myself out of it all the time, but I never seem to shake the habits. I try to think of what it is doing to me and my future, but no matter what, I keep creating excuses for myself to continue the procrastination. All I'm ever left with is regrets and a low grade. I am at an all-time low in my life, and I'm not even that old. I've always been a straight-A student, but now I'm getting C's and F's, and it hurts me to know that I am way better than that. It's not even like the work is hard.