Register at the Central Contractor Registration (CCR) web site
http://www.ccr.gov/

Register at the Online Representations and Certifications Application (ORCA) web site
https://orca.bpn.gov/

Sign up for e-mails from the Federal Business Opportunities site
http://www.fedbizopps.gov/

Small Business Set-aside Program (contracts under $ 100,000)
http://www.sba.gov/services/contractingopportunities
/sizestandardstopics/index.html

Small Disadvantaged Business Certification Program
http://www.sba.gov/aboutsba/sbaprograms/8abd/

HUBZone Empowerment Contracting Program
https://eweb1.sba.gov/hubzone/internet/index.cfm

Service-Disabled Veteran-Owned Small Business Concern Program
http://www.sba.gov/aboutsba/sbaprograms
/gc/programs/gc_service_disabled.html