Hello, time to post some work , little pieces to become confidant , here i going to put renders with basic materials (no dust , or damage or fingerprints, etc).
Rendered in cycles with only a HDRI no lights setup
Ballpoint pens
Marker
Pendrives
Mechanical Pencils
Cutter
Welcome to BA! 
Lots of good practice there! And how appropriate to have pens as your first Sketchbook entry. 
Welcome to blenderartists, @DaJor!
Great work so far 
Thanks for the welcome and the comments @piranha4D and @Charles_Weaver 
I featured you on BlenderNation, have a great weekend!
Whoa , I didn´t expect this …Thank you very much!
Procedural material terrain done following a substance designer tutorial in youtube, trying to see if i can do it with the blender nodes what its done in designer, the idea was to see and understand how and why it´s done each part of the material and try to apply in blender.
Too much trial and error until i reach this :
