Homonyms are words that are similar, but have different meanings. Examples of homonyms include: two/to/too, accept/except, and there/their/they're. All of which I have no problem with. The one that always catches me is affect/effect. I've tried to google up some simple rules but haven't had much luck. According to YourDictionary.com there are 5 rules for their use. Including 2. It is appropriate to use the word "effect" if one of these words is used immediately before the word: into, no, take, the, any, an, or and. As if I'm ever going to remember that (along with 4 others) while I'm writing a document. Some people say it's simple. That "affect" should deal with influence while "effect" should deal with result or causality. But to me that doesn't clarify it sufficiently, sometimes something can be interpreted as both resultant and causal. For example, I had to send an email this morning with the following line: Not to mention