One of the most common mistakes ChanteSeez (hee hee) is the contraction form of “it is” — it’s — used as a possessive pronoun (its).
Contractions take two words and make them one. Other contractions include “that’s” (that is), “we’re” (we are) and “what’s” (what is).
Consider the apostrophe a snap. Add an apostrophe whenever you want to “snap” two words together.
Even with this tip, the only way to truly avoid this mistake is to re-read your writing. Then ask yourself if you meant the “snap” version of “it is,” or its (see!) possessive pronoun sibling.