I punched a hole in my wall(drywall) when i wasnt really thinking. What is the best way to fix it?

cut a piece of drywall from the piece you will need to purchase, make that piece larger than the temper tandrum you threw. Place the new piece over the hole and trace it with a PENCIL, now use a drywall saw or a seratted knife to cut on the pencil line. Now you have a perfect repair piece. Now take two peices of 1x pine and cut 6 inches longer than hole but allow yourself room for your hands, insert wood into hole and hold firmly against back of drywall and screw into place from room side ,(gentle countersink screws),do same to other side of hole. The idea is to have a firm resting place for the drywall piece. Now place drywall piece in place and use 4 screws(countersink). Tape with drywall tape and mud three times allowing each coat to dry completely. Use thin coats and avoid tool marks . Apply each coat larger than the previous coat sanding between coats. """HEADSUP""""" drywall dust will get everywhere, not only in the room but through out the house. You may want to invest in a newer drywall mud called DUST CONTROL COMPOUND. It falls striaght down when sanded and avoids the airbourne problem and the resulting sinus infections that often happen in occupied housing during remodel or in repairs of "wasn't really thinking".