Six steps

1. "Keep tabs on respiratory symptoms. If you or someone in your family develops symptoms suggesting a cold or the flu, be alert for persistent or worsening symptoms, particularly a high fever.
2. Stay home if you're sick. If you do have swine flu, you can give it to others starting about 24 hours before you develop symptoms and ending about seven days later.
   
3. Wash your hands thoroughly and frequently. Flu viruses can survive for two hours or longer on surfaces, such as doorknobs and countertops.
   
4. Take extra precautionary measures if you visit or live in an affected area. Travel to Mexico has not been restricted, but some airlines are waiving fees for changing your travel plans.
   
5. If you have a chronic condition, such as asthma or heart disease, it's a good idea to wear a breathing mask when you're out in public in affected areas.
   
6. Be prepared. Ask your health care provider or county health department about infection-control plans in case of a serious swine flu outbreak. The antiviral drugs oseltamivir (Tamiflu) and zanamivir (Relenza) reduce the severity of symptoms. "

http://www.mayoclinic.com/health/swine-flu/AN02000