To all those mothers and fathers who are struggling with teen-agers, I say, just be patient: even though it looks like you can't do anything right for a number of years, parents become popular again when kids reach 20.
I tend to get comfortable with the dialogue and find out who the person is in the script and try to hit that. People are sort of independent of their occupations and their pastimes. You don't play a politician or a fireman or a cowboy - you just play a person.