What to do after a jobs hires you and tell you the will call you in a few days?

Well i just wanted to know what to do? Cause I had an interview on Friday June 24, 2011 and they told me they will call me in a few days? inn its already July 1, 2011 is that been to long to wait? what should i do keep waiting or call the person who called me in? please answer i would really appreciate it (: