The idiom "burn the midnight oil" means to work very hard or stay up late working on a task or project. It suggests that someone is so focused on their work that they don't even take time for basic needs like sleeping, eating, and socializing.

The idiom "second wind" refers to a sudden surge of energy or renewed enthusiasm for something that had previously run out of steam or lost momentum. It suggests that there is still some residual power left, just waiting to be tapped into again.

The idiom "volte face" refers to a sudden change of direction, opinion, or course of action. It can also refer to a reversal of roles, a complete turnaround, or a U-turn. The word "volte face" is French in origin and literally means "to face a new direction".

The idiom "in the meantime" is used to indicate that something is happening or will happen in the present moment, while waiting for another event or situation to occur.

The idiom "back to basics" means going back to the original or basic principles of something, usually in order to understand it more fully or solve a problem. It can also mean starting over or beginning again from the beginning.