Cropping in on a person can be difficult. Beginning photographers commonly shoot only full body shots because they aren t quite sure where to crop the body. The best tip I can give is not to crop off part of the body half way. For example, if you re going to crop off part of the head, make sure it isn t just skimming off the top of someone s scalp. If you are going to crop the top of the head, then crop down into the forehead so the viewer feels that you did it on purpose. Many photographers teach not to crop along the joints (knees, elbows, wrists, etc). That is also good advice, but I think that what it is trying to teach is to crop intentionally. If you re going to crop a little of the body, crop a lot.