In his farewell address, President George Washington gave America several pieces of advice. The two most prominent are:
1) Avoid the creation of political factions (aka political parties)- Washington believed that political parties would only cause individuals to be more divided in American society. He felt that these organizations would cause more problems than they would solve.
2) Avoid foreign entanglement- Washington wanted the United States to stay out of foreign affairs. Washington felt that only problems would result from getting involved in the affairs of other countries.