A person repeatedly washes their hands, even when they are not visibly dirty.

An individual checks and rechecks locks and appliances multiple times before leaving the house, despite knowing they are already secure.   

A person spends countless hours applying to numerous jobs, meticulously crafting each application. They may overanalyze job descriptions and worry about not being a perfect fit for each position.

A person engages in mental rituals, such as counting or repeating words silently, to reduce anxiety.   

When planning a vaction, a person spends weeks researching destinations, comparing prices, and reading travel blogs.