1. Capitalize the first and last words in titles and subtitles, and capitalize all other major words (nouns, pronouns, verbs, adjectives, adverbs, and some conjunctions – but see rule 4).

2. Lowercase the articles the, a, and an.

3. Lowercase prepositions, regardless of length, except when they are used adverbially or adjectivally (up in Look Up, down in Turn Down, on in The On Button, to in Come To, etc.).

4. Lowercase the common coordinating conjunctions and, but, for, or, and nor.

5. Lowercase to not only as a preposition (rule 3) but also as part of an infinitive (to Run, to Hide, etc.), and lowercase as in any grammatical function.