Genealogy is largely a fill-in-the-blank exercise, with just a few rules. Here are three you should memorize...

Women keep their maiden (birth) name throughout a genealogy. They do not change their name when they marry. Don't use "Susie (Smith) Jones" rather, spell it out: "Susie Smith, wife of Oscar Jones" or "Susie Smith, widow of Joe Blow, and common-law wife of Oscar Jones." Why? Because Oscar's sister was Susan Jones and you don't want to confuse Oscar, yourself or your reader. 

Dates. Genealogists always (it is a religion) write dates in the following format: DD MMM YYYY, never in the format DD/MM/YY, or the format MM/DD/YY.
Does 03/04/57 mean 3 Apr or 4 Mar? 
Does 57 mean1857 or 1957 or something else? 
Use the DD MMM YYYY format. It will save your bacon before you're done. Example: today is 03 Sep 2008 .

Places. Place names can be a little as you see on mail: "Simcoe, Ontario" but shouldn't be. Providing more is better, as in "Simcoe, Norfolk County, Ontario, Canada."

Write for international readers, and future readers who will not be as familiar with today's local place names, to minimize any chance of confusion. (Place names change. Which part of Mississauga was Port Credit?)

An early  genealogy said one of my ancestors married another, and "moved to St. Louis." But I could find no trace of them in Missouri. Years later I discovered their St. Louis was a small (very small) community in Michigan! Don't do that to your readers!