get one's shit together

/G EH1 T W AH0 N EH0 S SH IH0 T AH0 G EH0 DH ER0/
verb
  1. 1

    To organize oneself so as to be able to deal with or achieve something; mature

Source: https://en.wiktionary.org/wiki/get%20one's%20shit%20together