Each sentence ends with a period
Listed items are punctuated consistently (i.e., if one bullet item ends with a period, all bullet items should end with a period)
Commas, semicolons, and colons are used appropriately
Specialists answer phones, place orders, and update accounts.
Specialists answer phones; supervisors oversee teams of specialists.
The department has two types of employees: specialists and supervisors.
Hyphens (-) and dashes (– or —) are not confused
Hyphens connect word parts: quasi-governmental regulations
En dashes connect numerical ranges: 4/1/14–5/1/14
Em dashes connect phrases: federal law—specifically, Regulation X
Apostrophes fall before the "s" in singular possessives and after the "s" in plural possessives
a cardholder's account
our customers' needs
For more information, see Purdue Online Writing Lab: Punctuation.