A useful hardness chart for various types of wood with colors associated for each type.
12 Ways To Add Texture With Tools You Already Have | WoodworkerZ.com; Some, but not all, of these would work with metal.
How IKEA furniture should be...
A little bit more fine tuning and this joint will be ready to go together. 7 more to go, but that's just the start of this piece. It will get a lot more complicated. Note the ruler for scale @emmajenningsartist
Custom music stand base, bottom photo by Sean... - Taylor Donsker Design
Kawai tsugite joint. Maybe, after many years of pratice, I can do this set of cuts. Wow, what a design.