The idiom "pull yourself together" means to get organized or compose oneself, especially when feeling disrupted or upset. It can also mean to gather one's thoughts and make a plan of action.

"Shades of grey" is an idiom that refers to a range of colors or shades, particularly those that are neutral and don't have a clear definition or distinction between them.

The idiom "drive up the wall" means to become extremely angry or upset. It can also mean to be very stubborn or unwilling to change one's mind.

The idiom "head-on" refers to facing a situation directly and without hesitation. It means approaching an issue or problem with a clear and determined attitude.

The idiom "all in a day's work" means that something can be done or accomplished easily and efficiently within a regular working day. It implies that the task is not particularly challenging or difficult, and it can be completed in a short amount of time.