Jewish Festivals: Personal Eruv Tavshilin

One person per household should make an eruv tavshilin in order to allow cooking on a Jewish festival for the next day, if the next day is Shabbat.  The person sets aside something cooked and something baked and says a formula (which can be found in most siddurs).
Note An eruv tavshilin made by one person covers everyone in that household, including guests staying over for that Jewish festival--even if he or she did not intend it to cover anyone else.