In my undergrad studies, I got mostly As and a few Bs in all semesters except one, which I flunked each class. I feel stupid tell you this, but the reason I flunked is because I was intending on withdrawing the semester because I was very busy with a side business of my at the time. So I essentially stopped attending classes after the first couple of weeks. However, I missed the deadline to withdraw (due to my forgetful, unorganized nature at the time).
The good thing is, that semester was years ago. I took a break in between my education when I started up a pretty successful business of my own. Every since, I have about 80 hours of solid grades. The course I "flunked", I also retook them and got As.
I can have professors confirming that I was intending to drop at the time, since it's pretty obvious from my lack of work turned in after the first 2 weeks.
Anyway, how do I minimize the bad mistake of years ago and still have a decent shot at a good grad school or MBA program? My overall GPA is around 3.0, it would be around 3.7 if I didn't make that mistake. I really regret my past mistake but that's useless to say. My main goal is to show the admission officers that I'm a smart guy and I can handle the coursework. Most importantly, show them I've matured and I care.