nice and early, ahead of time

I prepare the material.

私は資料を準備します

I prepare the material needed for the meeting.

私は会議に必要な資料を準備します

I prepare the material needed for the meeting nice and early.

私は会議に必要な資料を早め早めに準備します

I prepare the material needed for the meeting nice and early with my coworker.

私は同僚と会議に必要な資料を早め早めに準備します

I prepare the material needed for the meeting nice and early with my coworker in the office.

私はオフィスで同僚と会議に必要な資料を早め早めに準備します