"Get your shit together" is a common phrase used to convey the idea of someone needing to organize or improve their life in some way. If this phrase is not appropriate or too harsh for a situation, there are some alternative synonyms you can use that still get the message across. "Pull yourself together" is a gentler way of saying the same thing, while "sort yourself out" or "straighten up" can also be used. Other variants include "shape up" and "get it together." These all convey a sense of needing to improve or organize oneself, without using vulgar language.