(1)  Don’t complain that you can’t afford your taxes.  The appraisal district only decided what you property is worth, but NOT the tax rate.  (2)  Do come armed with a specific value you believe your home is worth and the documentation to support that figure.  (3)  Don’t give a rambling presentation.  (4)  Do request in advance the documentation the appraisal district compiled to calculate its appraisal of your property.  See the differences, such as updates, near a busy road, size lot, etc.  GOOD LUCK!