get oneself together

adorn oneself with borrowed plumes

To claim the honor of another for oneself.

apply oneself

Synonym of strive: to work hard, to complete an activity with good effort and focus.

band together

to unite, to come together

bang some heads together

Attempt to get results from a previously ineffectual or argumentative group, typically by coercion or force.

be oneself

To behave or act naturally, without regard to how this behavior is perceived by others.

bear oneself

To behave and conduct oneself in a particular manner.

birds of a feather flock together

People of similar character, background or taste tend to congregate or associate with one another; it is easier to establish friendships with people that one has a lot in common with.

box oneself into a corner

To create a predicament or problem for oneself; to do something that leaves one with no good alternatives or solutions.