when I first started on blender I had problems with cam/lights too

what I did was move camera and lights to the last layer (select and press M pick layer you want off list)

now add an empty (name it eg cam empty)

now parent lights to camera and use a track to constraint from cam to empty

then when you want to set up the scene for rendering

move the empty to where you want the centre of scene to be , roughly place camera and lights, press 0 on keypad to see view through camera tweak as needed

hope that "A" makes sense and "B" is usefull to you