First Blender render I ever made! What an amazing tool it is!
5 min post processing in Photoshop.

Oh … one question perhaps … I have these lines in the end of the pencil. How come?

If you mean the artefacts at the rubber, this could be a problem with the normals or your topology has has tries istead of quads there.

If you could post a wireframe of this area, we could better help you.

Never the less, for a first render attempt, this is good work.
I would work on a little with the materials (the rubber is to glossy and the metall too).


Perhaps you didn’t enable Smooth shading in the toolbar? I didn’t really notice it until you pointed it out, though; it looks nice!