Though there aren’t any formal rules to follow when writing a list, these "guidelines" can help you create a well-structured list:

• Keep it simple. Each listed item should be stated simply and directly. There’s no need to write entire sentences within a list.

Here are some easy-to-follow guidelines:

• Put a comma at the end if the items are unpunctuated single words or phrases.
• Use a semicolon at the end if the items are punctuated but aren’t complete sentences.