Most federal agencies have excellent websites with valuable information. Many questions you have might be answered on one of these sites.
GovBenefits - A partnership of federal agencies and organizations to help you find government benefits you may be eligible to receive.
Department of State Embassy & Consulate - the worldwide links page will take you to the Consular Sections at U.S. Embassy and Consulate websites, where you can get phone numbers, fax numbers, e-mails, etc.
Internal Revenue Service - the IRS homepage gives a countdown to April 15th. You can find out more about filing your taxes and getting forms and other IRS products.
Office of Personnel Management - the OPM homepage provides information relevant to current and retired federal employees.
The Merit Systems Board - the MERIT homepage provides infomation on the board which hears appeals of federal employees of dismissals and other major personnel actions.Employee Benefits Security Administration - EBSA, formerly known as the Pension and Welfare Benefits Administration, provides news and information on agency services. The agency also has an online page for electronic inquiries.