Choose Your Keywords Carefully
Search engines are not human, and cannot understand all the nuances of the English language. That's another reason it's important to select your keywords carefully -- if you hope to have anyone find your blog so they can read it. And if you're trying to make money from your blog, your choice of keywords will affect the ads that are displayed on your blog, and how meaningful they might be to your readers.
Here's an interesting article that illustrates the effects your keyword choices have on your SEO and ad placement.
The Big Picture: Keywords Matter in Ways You Never Think