give a good account of oneself

a good deal

Very much; to a great extent; a lot; lots.

adorn oneself with borrowed plumes

To claim the honor of another for oneself.

all good

It's all good.

apply oneself

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

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.

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.

but good

To a high degree; very thoroughly; in a most definite manner.