Shark Tank's Mark Cuban's One Brilliant tip for Investing

Mark Cuban, who is famous for starting Shark Tank and some web casting thing, says this one tip really helped him out when he was just a young buck with the wind in his hair and only yearning for tomorrow. He could look steely-eyed into the far off yonder and see the future. Not now, though, when he can only see the dark black void that comes for all of us ahead of him.

This is the tip that really got him through each and every day when it was just him and his banjo. This tip is "buy low sell high."