* To-do list: This is the most common and preferred spelling, using a hyphen to connect "to" and "do."
* To do list: While less common, this spelling is also acceptable and emphasizes the verb "do" in the list.
* List of to-dos: This spelling is grammatically correct but less concise and sometimes considered less professional.
* List of things to do: This is another grammatically correct option, but it's longer and might not be as efficient in conveying the meaning.
Ultimately, the best way to spell "list of to dos" depends on your personal style and the specific situation.