Wait, they didn't cover that in real estate school! Knowing interior design tricks and tips isn't necessary in real estate!
Au contraire mon ami.
I'll concede that you don't have to be a professional designer - heck, you don't even have to take an interior design 101 course.
But don't make the mistake that you don't have to know anything about design. You should learn a few basics to aid your sellers in showcasing their home in the best possible way. This way, their home sells for the best possible price. If you don't know these few basic tips, you are costing your sellers money.