A checklist with ticks on a pieces of paper in the style of a shopping list or to-do list. 

List

A checklist with ticks on a pieces of paper in the style of a shopping list or to-do list.

A set of books with the last book leaning against the others.

Books

A person leaning sideways, lifting arms and maybe losing their balance.

A busy and overworked manager or employee surrounded by charts, graphs, and notifications.