Pictures often look better and more effective when
arranged in groups rather than in isolation - unless you have a
very large item which makes a statement on it's own.
Decide the appropriate area for this. For a group of pictures
you will require a fairly large area of wall. Don't try to push
pictures into an area too small for them - and have the effect of
looking very amateurish.
Gather together a selection of pictures which you like, which
have some tonal relationship with each other though not necessarily
in style or subject matter.
Frames can be varied, but if a picture has been framed for many
years, or is badly or cheaply framed then take it to a worthy
framers and get them to help you to select a frame. I recently had
some pictures framed at Graphics Plus in St Albans who are very
friendly and helpful.
Don't skimp on the frame. Be generous with the size and margins,
it can make an enormous difference to the finished look.
Place the pictures on the floor in front of the area where you
wish to hang them and arrange them - Re-arrange them until you feel
satisfied with the result. This is a job ideally for two people
Place dots on the wall behind all the pictures denoting where
they are to hang, then measure out to get it exactly right.
Hang your pictures and enjoy them!!