Tape gridded wrapping paper to the wall (leveled) then hammer the nails for the pictures directly through the paper. When everything is lined up, lift the paper off over the nails and hang your picture--voila!
Nail Holes How To: Make paper templates. Mark on each paper template exactly where the nail should go. Nail templates onto wall, nailing at the marks. Rip off the paper templates, and hang pictures on the nails.
stick plaster at the back of fixture poke nails through it to create holes remove plaster stick it on the wall drill holes into the wall using the plaster's holes as the exact nail positions walla! no more holes all over the place.
E-Z Toggle Bolts have saved my drywall countless times! Never, EVER use those plastic 'anchors' they are meant to be buried in concrete, NOT DRYWALL! Hanging Shelves, Hanging Mirrors and Hanging Towel Bars
Hammer nail through a wooden ruler. Hang picture on that nail. Line it on the wall where you want it. Remove picture, push in nail to make an indent. Remove ruler, hammer another nail into the wall Hang your perfect picture up.