When editing pages just keep the following rules in mind:

General#

• • Write in a way that is easy to understand and avoid local slang or phrases. Many of those who will read your text may not have English as their first language.
• Don't use too many acronyms (or at least, have a page explaining them)
• Avoid the "click here" phrase!! Don't say: "More info about etiquette can be found here" but use "More info about etiquette can be found at WikiEtiquette". I'd suggest avoiding it for external links as well.
• Contribute only original stuff. Links are fine, but don't cut-and-paste from copyrighted things.
• Correcting typos is quite okay - in fact, it's a very good habit, since it makes the web page more readable.