Shelter in place after a big EQ makes a lot of sense. This site has some very good advice on preparing for a big tremor. pay attention to preparing your house and be sure that you have necessary supplies stashed at various places (don't put all your eggs in one basket).

Be sure you can turn off your gas and other utilities and that you have alternative means of cooking, etc. Depending upon how densely urbanized your neighborhood may be, fire in the aftermath of an EQ may be a possibility (think San Fran 1906 or Loma Prieta 1989).