I generally move the camera and format the FOV, etc to the place where I want the scene to render, then use the director view to move around for placement. Along with that, remember to color code and name your object groups as this helps a lot when flying around the scene. On some occasions, I select two groups, overlay them upon each other to get the relationship close, then separate out. Also, watch your shadows on the bottom of the workspace. When in mesh view, the mesh will cast a mesh shadow and that helps you see if two objects are close or if one is way off and sized wrong.