[jarel]

For me the post boils down to "learn how to do these six things when editing code". Which is good advice to IDE users as well.

Okay, indentation and auto-completion are rather trivial things to do in an IDE, but most IDEs come with powerful search tools and for most IDEs I don't know how to use them.

[Derbasti]

Indentation by itself can be tricky, too. Is your code correctly indented when you copy and paste it somewhere? Can it correctly re-indent code that got mangled for some reason? How well does indentation cope with non-standard language extensions (think Qt or C++ macros)? So I would not call that trivial.