I tip at starbucks, but only if I am going to camp out for a while. The alternate method, buying additional drinks every time my current one hits empty, makes me a bit jumpy for the rest of the day.

When I studied for the bar exam, coffee shops were my favorite places to work, since they contain built-in distractions. Preparing with all of that going on makes taking the test in a large, silent room incredibly easy.

No employee is going to kick you out after a couple of hours if you've dropped $10 in their tip jar.