I had some fun recently with some pens and pencils, not real but rather virtual. Although the models are for the most part simple enough it was still a nice learning experience.
I tried a few methods to model the pencils tip and in the end went with a Boolean cutter, which kind of fits with the real world. Basically a 3D pencil sharpener.
Next, I decided to model a Stabilo pen, as I happened to have one laying around on my desk. The pen was nice in its youth, but now old and drying out. It is too faint to be of much use other than light outlining and model reference.
Anyway here are some of the renders from my little writing episode: