There are a number of categories listed under "Opening a Business"
 
Business Tools
    Better Business Bureau
    Arlington Technology Incubator
    City of Arlington Economic Development
        -City Incentives

    Other resources (Local)
        -D/FW Minority Business Development Council
        -North Texas Women's Business Council
        -North Central Texas Regional Certification Agency
    Other resources (State)
        -State of Texas www.state.tx.us
        -Comptroller of Public Accounts www.cpa.state.tx.us
        -Office of the Governor  www.governor.state.tx.us
        -Texas Department of Economic Development www.tded.state.tx.us
        -Texas General Services Commission www.gsc.state.tx.us
        -Texas House of Representatives www.house.state.tx.us
        -Texas Secretary of State www.sos.state.tx.us
        -Texas Senate www.senate.state.tx.us
        -Texas Association of Business and Chambers of Commerce www.tabcc.org
    Other resources (Federal)
        -Bureau of the Census www.census.gov
        -Occupational Safety and Health Administration www.osha.gov
        -U.S. Dept. of Commerce www.doc.gov
        -U.S. Dept. of Labor www.dol.gov
        -U.S. Small Business Administration www.sba.gov
        -U.S. Chamber of Commerce www.uschamber.org
 
Workforce
    County-Tarrant County http://www.workforcesolutions.net
    State-Texas Workforce Commission http://www.twc.state.tx.us 
   
Permit
    Certificates of Occupancy (link to City Building Inspections Office at http://www.arlingtontx.gov/build/codesandordinances.html
    Health Inspection Permits (link to Environmental Services webpage at http://www.arlingtontx.gov/health/applications.html
    Register a Business Name (link to Tarrant County Clerk at www.tarrantcounty.com 
    -Register an Assumed Name and what are associated with this?
    -Assumed Name Reads
    -Assumed Name Certificates
Home Based Business
    Permit Application (link to City's Building Inspection's application at http://www.arlingtontx.gov/business/pdf/homebasedbusinessapplication.pdf
 
Tax Information
    Sales Tax (link to State Comprtoller's Office at http://www.window.state.tx.us/taxinfo/sales/questions.html
    Property Tax (link to Tarrant Appraisal District at http://www.tad.org/Default.aspx