I find that a lot of people are afraid of semicolons. Either that, or they sort of kind of think they might have an idea about how to use them… From what I have observed, semicolons are probably the most misunderstood punctuation mark. And that’s very unfortunate because they’re actually very simple to use. They also show up on the SAT and ACT English a whole lot.
Here’s the rule: semicolon = period
That’s it. Seriously. Wherever you can use a period, you can also use a semicolon.