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Blender 2.8.x / 2.9.x
Get it here: https://builder.blender.org/download
Shade Smooth is a built-in auto bevel that is identical to an ‘Angle’ Bevel modifier. Outside of this global object bevel, there is the Bevel modifier (parametric modelling) and the Subdivision surface modifier (subdivision modelling relying on proper edge loop topology). How to exclude edges from being ’rounded’ by a bevel:
Tip: Mark Seam (pale red) is used for creating seams for UV unwrapping.
Tip: Crease Edge / Bevel Weight:  to set. [-1] to unset.
Tip: Moar bevels: vertex group bevel and custom profile bevel *sigh*
Use it. [CTRL+1 | 2 | 3]
Reinforcing corner edges:
Common subdivision surface modelling tricks:
– Select edge(s). [RMB] > Subdivide to create verts.
– Select edges. [CTRL+B] to 2D bevel.
– [CTRL+R] to create edge loops.
– [SHIFT] and/or [CTRL] select.
Always check your normals.
When in doubt, merge.
Use it. Cuts through faces unlike [F].
When cleaning up parts of a mesh or bridge areas I often find myself punching a hole first and then using [F] to build new edge topology in the problem areas from the ground up, followed with [F] to make faces. Hate it. Tried knife tool but has poor vertex snapping. Love [J]. [J] is cool. Just use [K] and [J] combo from now on and dissolve or merge vertices / edges (or auto merge with edge slide).
[Z] for facing or through cut (see status bar). [C] for ortho.
When modelling sub-parts that are not aligned to X, Y Z axis, start modelling in world origin along X, Y, Z and parent to an empty before messing things up / things get messed up / rage quit.
Extrude vertices along global (X, Y, Z) or local (XX, YY, ZZ) to create additional vertices on intersections.
Use it. Instant focus (Pan / Zoom) to selection (vert, edge, face, object).
Use it. Hold [ALT] to slide beyond limit. Hold [CTRL] to vertex snap whilst edge sliding.
Select a face. then press [SHIFT+NUM7] to align view to that face. If you switch Transform Orientation from ‘Global’ to ‘View’, you can now move things around that are not aligned with X, Y or Z axis and that you cannot edge slide.
2 intersecting objects > [CTRL+J] > [TAB] > Mouse over smaller of the two parts > [L] > [F3] Bool > Union.
Can also use Intersect (Knife). Use it.