Here are some semi-colon rules for the grammatically challenged: Colon Commands
The semi-colon is a punctuation mark that is often misused. It is used to separate two independent clauses, but not to replace commas.
Colon vs SemicolonThe colon is a punctuation mark that is often used to introduce lists, definitions, and quotations. It is the semi-colon's superior cousin.
SemiColon KingOther punctuation marks are not as interesting as semi-colons and colons, but they are still worth mentioning: Other Punctuation