Keeping on top of work tasks and personal to-do's doesn't have to be complicated.
If serial entrepreneur and investor Marcus Lemonis can run multiple businesses using mere notecards, there is hope for the rest of us.
"I have little notecards in my closet, in my basement," Lemonis said. "I'll make a list of the five things I want to get done that day."
The notecard is a promise to himself.
"Without exception, I have to get those five things done," he said.