Property Tax Appraisal

We just received this year's property tax appraisal.  The assessed value of our home has gone up and the property taxes increased by about $100 for the year.  Oklahoma has a state income tax and this results in lower property taxes than most states.  We only pay $1,800/year as opposed to the $6,000+ I was paying in Austin.  Of course, Texas does not have a state income tax so they make up the difference with higher property taxes.  Anyway, I came across a good write up in this month's Kiplinger's Magazine.  Apparantly, there is a good online resource that explains how to appeal the tax increase.  According to this organization, about 33% of all property-tax appeals succeed.