Rules of Good Grammar Summarized or reported verbatim from "grammarbook.com"
Spacing After Periods	"Originally, typewriters had monospaced fonts, so two spaces after ending punctuation marks such as the period were used to make the text more legible. However, most computer fonts present no difficulty with proportion or legibility, so use just one space after a period, colon, question mark, or exclamation point at the end of a sentence."
Quotation Marks and Punctuation	"In Grandma’s day, a period used with quotation marks followed logic: Example: Myrtle said the word “darn”. The period went outside the quote because only the last word was in quotation marks, not the entire sentence. Example: Myrtle said, “I would never say that.” The period went inside the quotation mark because the entire sentence is a quote. Today, in American English usage, the period always goes inside the quotation mark. Example: Myrtle said the word “darn.” This does not follow logic, but it makes life easier for those of us who have enough to think about besides punctuation."
Consistency: Treatment of Numbers	"Deciding whether to write numbers as numerals or as number words is a matter of style. The style for a literary publication may differ from the style for a journalistic publication. The key in all cases is to use a consistent style throughout your writing." Consistency on treating numbers
Plurals and apostrophes	"To show plural possession, always make the noun plural first, then use the apostrophe."
Singular posession	"To show singular possession, use the apostrophe and then the s."
Proofreading well	"Research shows that written communications full of typos, misspellings, and usage errors leave readers with a poor impression of the writer and the organization. But proofreading well is challenging. Before you begin proofreading, make sure your document is reader-focused—with a clearly stated main point, clear organization, easy-to-read formatting, and concise language. Then follow these guidelines and you'll present a consistent professional image every time: Take a break between writing and proofreading. The best proofreading is done when you have distance from a document. <>Use the spell-checker and grammar-checker slowly and carefully to help you catch your typos. When used mindfully, both are helpful tools. When used carelessly, they will lead you to make new errors almost as often as they help correct existing ones.  Whenever possible, proofread from a printed page. Errors are easier to see on paper than on a screen. If you have to proofread on a screen, zoom in so that the text is very large. This will allow you to see errors you might otherwise miss. Read your work aloud. By slowing down and articulating each word, you'll catch most of your mistakes. And remember, if it doesn't sound right, it probably isn't. Use your word processing program's Find feature to catch your writing demons—those pesky little mistakes you frequently make. For example, if you tend to confuse accept with except, then type those words into Find so you don't have to hunt for them. Proofread several times, taking breaks in between.  If the document carries a lot of weight, give it to a trusted co-worker to proofread after you've given it your best shot. This tip was brought to you by the fabulous editors at Write It Well. For more information about how Write It Well can help you or your staff write more effectively at work, visit writewell.com."
Job titles & capitalization	"With capitalization of job titles, there are rules and then there is the “rule.” The rules are based on some precedent while the “rule” is based on ego. Let’s go over the rules that have precedent first. Rule: Capitalize job titles immediately preceding the name when used as part of the name. <>Example: We asked Chairperson Leong to join us at the meeting. <>Rule: Capitalize job titles immediately following the name when the word the does not appear in front of the job title. <><>Examples: Ms. Leong, Chairperson, will join us at the meeting. Ms. Leong, Chair, will join us at the meeting. Mr. Hanson, Editorial Advisor for The Independent Journal, helped draft the article. <>Rule: When the appears in front of the job title, do not capitalize. <><>Examples: Mr. Hanson, the editorial advisor, helped draft the article. The chairperson, Sarah Leong, will join us at the meeting. Mr. Cortez was the senior managing director of the Baskin Group. <>Rule: Capitalize titles in signature lines. <><>Examples: Sarah Leong, Chairperson Craig Hanson, Editorial Advisor <>Rule: Do not capitalize titles when used descriptively. <>Example: Ms. Leong, who will chair the meeting, is always on time. <>“Rule”: The “ego rule” is that you may have to ignore the above rules in real life. If someone in your office (as in your boss) wants his or her title capitalized in all situations, then do so. Generally, the higher in rank someone is in an organization, the more likely his/her title will be capitalized at all times." from Grammarbook.c<>om
Effect vs. Affect	"Knowing whether to use effect or affect may not qualify you as a genius, but you will be demonstrating an understanding about a grammar issue most people find perplexing. I trust that the strategies offered here will clear up any confusion you have had. Rule: Use the verb effect when you mean bring about or brought about, cause or caused. Example: He effected a commotion in the crowd. Example: She effected a change in procedure. Rule: Use the noun effect when you mean result. Example: What effect did that speech have? Rule: Also use the noun effect whenever any of these words precede it: a, an, any, the, take, into, no. Note: These words may be separated from effect by an adjective. Example: That book had a long-lasting effect on my thinking. Rule: Use the verb affect when you mean to influence rather than to cause. Example: How do the budget cuts affect your staffing? Rule: Affect is also used as a noun to mean emotional expression. Example: She showed little affect when told she had won the lottery."  from Grammarbook.com
Their, There, and They're	See if this explanation is helpful to you. Visit this web page to take a quiz to see what you know about these three commonly misused and confused words.