Lay out your gallery arrangement. Flip frames over. Mark hanger/nail spot on several pieces of wax paper taped together. Flip waxed paper over, tape to wall, nail into wall where indicated. Remove waxed paper. Hang photos.
If you're building (or upgrading) office furniture, here's a smart tip to add "cord channels" and cord holes wherever there will be items plugged in--no more criss-crossing, dangling cords! | The Lettered Cottage