Oh sure, I'm a disaster. First, I recognize and always appreciate that for me anyway, it's a privilege to have that problem. For example, when I had to have full time jobs or had babies at home or whatever, my days were pre-determined and I didn't even have the luxury of choosing to be an ass, haha. (not to call you names, strictly speaking of myself there!)
Aside from that, I think some people are just naturally more organized and focused than others. I believe they are gifted, seriously. Hey, we can't all be gifted at everything, right?
I have a rough, simple schedule in mind, five standing things I am supposed to accomplish every weekday. I'm so scattered that I even use a chart on my computer to keep track of that. I can mix and match just so it all gets done within the week. Weekends, I can catch up or start early on the next week. Even so, I get it done about half the time. Then I say, whatevah. My family seems happy, my husband seems to like me, what needs to be done is done, my house is pretty clean, we eat, etc. In other words, don't forget there are far worse crimes than not being as "together" a person as you would like to be and/or believe you should be. Don't get discouraged, just keep trying and you get better at it over time.
For general home and life management habits, Flylady is great, too.
http://www.flylady.net/
Good luck.