the best piece of advice i can give you (or anyone) is whatever your doing, think of how it looks to your boss. If there is nothing to do, run in circles looking busy. If you cant think of anything to do, sweep the floor, even if it doesn't need swept. Or wipe the counter off, even if you did it 10 minutes ago. It might be a waste of time and effort, but your boss will see you "working hard." Also, always walk like your on a mission, even if you aren't. You could be walking across the store to go to the bathroom, but walk diligently like your in hurry for something important, You might be doing nothing, but its all about what it looks like to your boss(or more likely, bosses). This goes for everything else in your work life too. Blaming your not showing up, on your ride, doesn't look good. Remember, where theres a will theres a way. If you don't have a car, you should probably have a bicycle. You might have to leave an hour earlier but its better than not showing up