Always be on time to work. (that means at least 15 minutes before your start time) Always remain to the end of your shift, and return from lunch and breaks as instructed.
Time is the largest measurement for business. All workers are expected to honor time and being punctual begins and ends with you.
For example, Los Angeles County traffic is 100% unpredictable and therefore if you drive a car to work allow plenty of time to arrive early. It can easily take 30-minutes under good traffic conditions in any direction,so give yourself an hour to make the trip. Although reliable, public transportation does not always meet the standards, so do not practice cutting it close and allow for ample time to arrive early when using a bus, train or rail.