As another poster suggested, the Park Tool site http://www.parktool.com/repair/readhowto.asp?id=75 has a comprehensive section on bike repairs. The provided link is to the part about the front dérailleur adjustments. It is strongly suggested that you follow the directions, in order, one step at a time. Doing one dérailleur adjustment can affect other parts of the dérailleur adjustments.

Adjusting dérailleurs isn't hard but until you understand how to do it, they can drive you nuts!