Here's a really good writing-tip series by Rachel McAlpine on Contented.com that talks about using a system when editing documents:

• Writing tip: When editing, use a system
• Writing tip: Stage 1 of your editing system—big picture
• Writing tip: Stage 2 of your editing system—headlines, paragraphs
• Writing tip: Stage 3 of your editing system—copyedit
• Writing tip: Stage 4 of your editing system—technology check
• Writing tip: Stage 5 of your editing system—proofread

It’s simple, straightforward, and incredibly useful.

Enjoy :)