I know we've done it before, but a review of those pesky ones couldn't hurt. Here's a reminder of some of those words that are being used incorrectly so often that you might be taken in and start using the wrong ones yourself.
All right: Notice there is no other way to write that: Without two words, all right is all wrong.
Affect—a verb that means to change a response: The warning sign didn't affect his driving.
Effect—a noun that means a result: The warning sign didn't have any effect on his driving.
or a verb that means to cause: They hoped a sign would effect a change in him.
Anxious—to look forward to with fear: He's anxious about having to speak to this crowd.
Eager—to look forward to with excitement or pleasure: She's eager to be on stage again.
Comprise—the parts are contained in the whole: Veggies and tofu comprise the entire menu!
Composed of—the parts make up the whole: An entire menu composed of veggies and tofu?
Everyday—ordinary or commonplace: Walking to work is an everyday thing for him.
Every day—daily: He walks to work every day—three miles!
Ex—immediate past position holder—She's the ex-president of the PTA at the high school.
Former—earlier position holder—He's a former PTA president of the high school.
Fewer—refers to a smaller number of countable things: There are fewer cookies in the jar.
Less—is used for a smaller portion of a single thing: There is less water in this glass.
Healthy—the state of something's health: He was finally healthy enough to start playing again.
Healthful—meaning good for your health: She mistakenly thinks diet sodas are healthful.
Imply—to suggest or hint: He implied that someone in class was cheating.
Infer—to assume or form a conclusion: How could you infer that he was talking about you?
Its—a singular possessive pronoun that refers to a singular thing: That car lost its bumper!
It's—a contraction of IT IS and nothing else. EVER: It's time to learn this one.
This kind—singular pronoun with singular word: I love this kind of dark chocolate.
These kinds—plural pronoun with plural word: I love these kinds of chocolates.