Certain rules when it comes to hanging pictures can be learned after years of experience. First, unless you've always yearned to live in an art gallery, don't hang pictures on every available wall space, hang a picture on a wall only if it seems bare without it. If you are going to hang some pictures consider doing so over a console, a sofa, a server, a small pier table, or in groups.
Also important is the second rule. Never make the groupings wider than the furniture underneath it. If your pictures vary in size then you should hang them close together in order to achieve a unified look. Maybe you have a prized collection of bird prints but the frames do not match and their sizes vary. Frame by frame hanging of pictures should be avoided and instead go for pleasing geometrics.
Another rule follows. In close proximity may be how pictures are hung but the wall acts as a frame which serves to set off a group of pictures on all four sides. The concept of pleasing geometry pertains to arranging pictures to form a square or even a rectangle. When your task involves four pictures all framed alike and of the same size a good idea would be hang them geometrically in a square over the sofa, or in a straight line over a long table, or vertically above a small step table. Using the step pattern to hang pictures is ideal for staircases. When it comes to the best pattern it is a straight line meeting at right angles. Every now and then a little regimentation works better.
Take into consideration a possible collection of pictures accumulated over time including old family portraits, originals, prints, and reproductions. Should you like to hang them together then unifying them would be framing and matting everything alike. Matting them in forest green, one friend used simple gold frames for 16 prints. Resulting in a marvelous look was setting them against a red wall. Another friend added color by matting each picture over her sofa in a different color. For the pictures here they were of the same size as well as of the same subject.
Did you ever feel that something was missing as you stared into a department store model room? Regardless of how picture perfect the room is no one ever ate, slept, lived, and took phone calls in there. That indefinable something called individuality. This will complete your home.
The reason behind a department store model is the selling of furniture but when it comes to your home the goal is to achieve your comfort and pleasure. Start with color, forget this year's in shades, What's your favorite color? The mood of a particular room can be affected by the color you choose. A color can evoke a particular emotion. You should probably go and take a look at some color charts until you find colors that you are drawn to for your space. In this situation the best choice is you own choice.