What Are the Most Commonly Missed Deductions You See

I'm not preparing taxes right now, so I can't explicitly speak to the most missed deductions, but I can take a stab at what I think is likely. And on that front, I'm thinking about the deductions that are available to both standardized filers and itemizing filers. This includes health premiums paid by self employed individuals, alimony paid as a result of divorce, educational payments including tuition, fees, and student loan interest, and financial losses associated with securities disposals or property losses from some kind of casualty or disaster.