Abbreviations
Apostrophes
Capitals
Colons
Commas
End punctuation
Hyphens
Other punctuation marks
Quotation marks
Numbers
Semicolons
Spelling
Underlining or italics

Abbreviations

• Acronyms and abbreviations
  A detailed guide from the Langley Research Center (NASA).
  

• Using abbreviations
  Tips on forming and punctuating abbreviations, from the Guide to Grammar and Writing.

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Apostrophes

• The apostrophe
  Advice on three main uses of apostrophes, with review exercise, from the Purdue Online Writing Lab.
  

• The apostrophe
  Brief set of guidelines, with examples, from the University of Ottawa.
  

• The apostrophe
  Guidelines for main uses, with link to quiz, from the Guide to Grammar and Writing.
  

• Possessives, contractions, and the apostrophe
  Guidelines on when to use apostrophes, from the University of Richmond.

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Capitals

• Capitalization
  Thorough set of tips on capitalization, with quiz, from the Guide to Grammar and Writing.
  

• Capitalization
  Detailed guidelines on capitalization, from the Langley Research Center (NASA).

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Colons

• Using colons
  Advice on when to use a colon, from the Gallaudet Writer's Handbook.

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Commas

• Comma rules
  Guidelines and examples for comma use, from St. Cloud State University.
  

• Rules for comma usage
  Eleven tips, with examples and links to several quizzes, from the Guide to Grammar and Writing.
  

• Proofreading for commas
  Guidelines on six main points for comma use, from the Purdue Online Writing Lab.
  

• Using commas
  Guidelines on six uses of commas, with examples, from the University of Richmond.
  

• The comma
  Do's and don'ts for comma use, with a review quiz, from the University of Ottawa.
  

• Recognizing comma problems
  Brief discussion of avoiding comma errors, from the University of Victoria.

Commas with coordinating conjunctions

• Rules for comma usage
  Advice on punctuation with coordinating conjunctions, from the Guide to Grammar and Writing.
  

• Using commas with coordinating conjunctions
  Guidelines on five main uses of commas, with examples, From the University of South Carolina.

• Using commas
  Information on using commas with introductory elements, from the University of Richmond.
  

• Commas with introductory elements
  Advice on commas with introductory elements, from Old Dominion University.

• Punctuating restrictive and non-restrictive modifiers
  Using commas with essential and nonessential elements, from the University of Wisconsin at Madison.
  

• Commas that enclose
  Guidelines for using commas with nonessential elements, from the Langley Research Center (NASA).

• How to punctuate short quotations
  Information on using commas with quotations, from the University of Victoria.
  

• Commas with quotations
  Tips on when and how to use commas with quotations, from Old Dominion University.

• Commas that shouldn't be there
  Information on unnecessary commas, from Old Dominion University.
  

• Unnecessary commas
  Twelve situations where commas aren't needed, with examples, from the Keables Guide.

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End punctuation

• End Punctuation
  Discussion of end punctuation marks, with exercises, from Parkland Community College.
  

• End punctuation
  Guidelines on periods, exclamation points, and question marks, from the University of Ottawa.

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Hyphens

• Using hyphens
  Five rules for using hyphens, illustrated by examples, from the Purdue Online Writing Lab.

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Other punctuation marks

• Dashes
  Advice on using dashes, from the University of Wisconsin, Madison.
  

• Parentheses
  Advice and an exercise on using parentheses, from the Guide to Grammar and Writing.
  

• Brackets
  Advice on using brackets, from the Guide to Grammar and Writing.
  

• The ellipsis
  Advice on using the ellipsis mark, from the Guide to Grammar and Writing.
  

• The slash or virgule
  Advice on using the slash, from the Guide to Grammar and Writing.

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Quotation marks

• Quotation marks
  Tips on using quotation marks, especially for quoting from literature, from the Purdue Online Writing Lab.
  

• Punctuating quotations
  Thorough guidelines for using other punctuation in quotations, from St. Cloud State University.
  

• Using quotation marks
  Brief guidelines for using quotation marks, from the University of Richmond.

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Numbers

• Using numbers and writing lists
  Thorough discussion of when to use numerals and when to use words for numbers, with numerous examples, from the Guide to Grammar and Writing.
  

• Numbers
  Extensive advice and examples of how to use numbers, from Colorado State University.

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Semicolons

• Semicolons
  Guidance on using semicolons, from the University of Wisconsin,Madison.
  

• The semicolon
  Brief tips on semicolon use, from the University of Ottawa.
  

• Using semicolons
  General guidelines on when to use semicolons, from the University of Richmond.
  

• The semicolon and colon
  Coverage of both types of punctuation, with examples, from St. Cloud State University.
  

• Using semicolons
  Brief discussion of semicolon use, from the Purdue Online Writing Lab.

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Spelling

• Some rules and suggestions about spelling
  Tips and quizzes for improving your spelling, including a list of commonly misspelled words, from the Guide to Grammar and Writing.
  

• Spelling
  Tips and quizzes on four standard spelling rules, from the University of Ottawa.

• Alan Cooper's Homonyms
  An extensive list of easily confused words.
  

• Notorious confusables
  Lists of, and quizzes on, frequently confused words, from the Guide to Grammar and Writing.

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Underlining or italics

• Using italics and underlining
  Guidelines from the Guide to Grammar and Writing.
  

• Overview of italics and underlining
  Brief discussion of principles, with some examples, from the Purdue Online Writing Lab.

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