let oneself go

adorn oneself with borrowed plumes

To claim the honor of another for oneself.

all dressed up and nowhere to go

Elaborately attired or otherwise fully prepared for an anticipated situation or activity which, nevertheless, fails to occur.

all systems go

Everything is ready.

apply oneself

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

as you go

While one is doing (something); as one progresses.

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.

boldly go where no man has gone before

To break new ground.