ADD isn't really a disease. It's a technical definition for you developing bad
habits of focusing on what you want to do instead of what you need to do. ADD is nothing more than another source of income for psychiatrists and pharmaceutical companies.
I, too, have these bad habits. In high school, things go slowly, so it's easy to understand things. I almost always got A's by doing minimal work. When you get to college, however, things become more accelerated. Unless you've developed proper studying techniques and habits, you're doomed.
What you need to do, is make yourself go to a library or a study room. I do this a lot, and I find it allows me to concentrate much, much better without any distractions. Over time you'll develop the proper studying habits, and you may find that you can concentrate perfectly fine anywhere...
As said by Ken, I believe it's more of a psychological/ego problem. You don't want to study because you believe that college is just like high school and you'll remember everything. However, often times in college, tests are much, much more difficult than what you will study. You need to start taking charge of your investment and make the best of it. College isn't just "another step", it's about learning things beyond what is taught in high school. If you think of it as just "another step" to making the "big bucks", you're doomed to fail.
ADD