The sketchbooks of John Clapp are simply wonderful to browse.
When you visit his site you may want to settle back with a cuppa for some visual sustainance and reading material and read Suggestions for Improving a handout he gives to his drawing students on how to develop drawing skills.
About his sketchbooks he states that:
When you see an artist’s sketchbook, you’re really seeing how they think; which is the most important part of being an artist in the first place.
These are not necessarily representative samples from my sketchbooks, (I have pages filled with to-do lists and other mundane items) but they are a sampling of some of the more interesting pages. I deliberately included the full pages though to show that there might be a really bad drawing right next to something worthwhile. Personally, I think that’s exactly what makes them interesting to look at.