[mixmastamyk]

It pays to look thru the stdlib every so often, there is just so much there, and plenty of dark corners (in the Warcraft sense) to look in.

I hand rolled stuff in itertools/functools for years before discovering them.... collections Counter, etc.

Or how about str.partition instead of try: str.split() ?

[Twirrim]

On a related note, every couple of years I make an effort to man page every cli tool I use, and re-read the man page, just in case. Most times I discover there is some argument that I've missed before in a tool (or has been added in the intervening time)

[jedberg]

When my dad sold cars he’d always tell his customers to read the car manual again after six months for the same reason.