Accent marks: Accent marks can now be used with people’s names when they ask for it, are known to use them or if quoting from a language that uses them.
Casualties: Avoid the word because it is vague and can refer to either injuries or deaths. Instead, be specific.
Cocktail: Don’t use in reference to a mixture of drugs. Instead, use "drug combination" or simply drugs or medications.
Data: Now takes a singular verb and pronoun except in academic and scientific papers. In data journalism contexts: The data is sound. However, in scientific and academic writing, plural verbs and pronouns are preferred.
Hyphens: No longer use hyphens for African American, Filipino American, and compounds as “third-grade teacher” and “chocolate-chip cookie.” When using compound adjectives formed with “well” (suspensive hyphenation) such as well known, well fed, well dressed, hyphenate before the noun but not after. Do not use a hyphen with double-“E” combinations such as “preelection,” “preeminent,” “preempt,” “reenter,” etc.
Latinx: The use of gender-neutral Latinx “should be confined to quotations, names of organizations or descriptions of individuals who request it and should be accompanied by a short explanation.
Marijuana: Pot or cannabis is OK on the second reference. Dispensary employees are budtenders.
Percentage: The percentage sign is OK to use with a numeral (no space between) instead of writing out “percent” or “percentage.” Example: “His mortgage rate is 4.75%.” For amounts less than 1%, precede the decimal with a zero: Example: “The cost of living rose 0.6%.”
In the early part of the 20th century, a common rendering was “per cent.,” two words with a period after the “cent,” possibly because it was abbreviating the Italian “per cento.” The first formal AP stylebook, in 1953, called for “per cent,” and that stuck at least through the 1970 stylebook. By 1977, though, it had come together as “percent.” That’s common in the United States, though British English leans towards “per cent.”
Merrill Perlman writing in the Columbia Journalism Review
Race: Whether a subject is black or white need not be reported unless it’s pertinent to the story. Avoid calling someone “a black” or “a white.” Limit the use of the terms “blacks” and “whites” as plurals. Black and white are acceptable as adjectives when relevant.
Racism: OK to use “racist” or “racism” instead of euphemisms like "racially charged."
(sic): Do not use (sic) to show that quoted material or person’s words include a misspelling, incorrect grammar or peculiar usage. If it has to be explained, explain it outside the quotation, or just paraphrase the quotation.
Split infinitives: OK to use. Avoid awkward constructions (to leave, to help, etc.) or compound forms (had left, are found out, etc.).
Suspect: Avoid when talking about a person of unknown identity who committed a crime. Correct: Police said the robber stole 14 diamond rings; the thief ran away. Incorrect: Police said the suspect stole 14 diamond rings; the suspect ran away. Correct: Police arrested the suspect the next day. Incorrect: Police arrested the robber the next day.
A full list of the changes here.
AP says the percentage sign now OK when used with a numeral (that’s shift+5) Poynter