How do you do more than one grad class a semester?

[martialartist]

I am currently working full-time with a 1hr drive each way and taking 3 classes in the summer semester (ENMU)and attempting* to handle family obligation and bring a new invention to market and it is literally mind numbing. I have zero time to do much and trying to survive on 4.5 hours a sleep per night. I actually, would not suggest it. I don't lack motivation just time in a day to successfully execute plans. I have an A in 2 of my classes and failing one, so I better get back to it now.

If you happen to see the time-god's please send them my way, I am exhausted! If you think it is possible go for it, otherwise pace yourself. Yikes!