Any tax deductions I can take?

I spend over $1000 a year in gas driving back and forth from home to the house where I take care of my MIL and FIL. I don't get paid anything and no possibility of ever getting anything. Just wondering if there are any tax deductions I can take?  I have a small business that the wife had to take over as she was unable to physically take care of her mom and dad, and I have a small rent check from my farm and a little ebay earning, that is taken by the gas, and insurance and repair of the car I drive.  Anyone find any deductions they can take? I itemize, and have my taxes prepared for me but want to see if anything they might miss. This will be the first full year for tax being an unpaid caregiver.