To avoid the stack-of-random-papers syndrome you describe, how about getting a pocket-sized notebook in a noticeable color, so you can find it easily and keep it on your person. That way you will not misplace your to-do list.
Also, be positive! Just because you've been unsuccessful with time-management in the past does not mean you can't do it...where there's a will, there's a way! My Pop used to tell me, "It's a matter of motivation. If someone told you they'd give you a million dollars to do something, you'd find a way to do it.":D
