Extreme close-up: Focuses on a single facial feature, such as lips and eyes.
Close-up: May be used to show tension.
Medium shot: Often used, but considered bad practice by many directors, as it often denies setting establishment and is generally less effective than the Close-up.
Establishing shot: Mainly used at a new location to give the audience a sense of locality.
(i found this really helpful, since i am such a sucker for close-ups. enjoy!)