Near at hand; within easy reach.

In one's presence; openly.

Standing up, especially in order to deliver a speech.

Putting forth one's best efforts.

Synonym of of one's choice

Performing as well as one can.

(US) used to emphasize that one is behaving or going to behave in a trustworthy manner. / (dated) expected to do what one has promised, expected to uphold one's promise.

(informal) Performing as well as one can.

Placed in a situation where one's best behaviour is necessary or advisable.

As far as concerns one.