Fast Patch Backing. If you're installing a drywall patch, you've got to screw the patch to something. Usually, that means installing wood backing. But here's a quicker, easier way: Screw drywall repair clips to the surrounding drywall and screw in the patch. Break off the tabs and you're ready for mud. Get 6-pack at home centers.
Step by step guide to repairing drywall: http://www.planitdiy.com/how-to/painting-decor/how-to-repair-drywall/
10 Tips and Tricks for Patching Drywall Like a Professional
Patching drywall, how to patch drywall, home improvement tutorials, patching drywall tutorial, popular pin, DIY home improvement, easy home improvement.
How To Tape, Mud, And Sand Drywall
Drywall Taping, Mudding, & Sanding – Oh My! | Young House Love, very detailed on process with great success