Drill all 87 until you don't have to think about them.
the free Superhuman
Gmail ships these switched off: Settings → General → Keyboard shortcuts: On. You’ve had this the whole time. Search-operator drills type into a faux search box — nothing is ever sent to Gmail.
Level 1 free · no account · runs in the browser
Every deck is graded 1 to 6: level 1 is the reflex core, the top level is where the specialists live. One move from each, so you can see how far it goes.
Start a new email
starting mail without the mouse is the gateway habit
…and 7 more at this level
Jump to the Inbox
back to the queue from anywhere in Gmail
…and 8 more at this level
Move to the older conversation in the list
j/k walks the queue — the vim habit Gmail adopted
…and 16 more at this level
Bold the selected text while composing
emphasis without a toolbar trip — same chord everywhere
…and 19 more at this level
Choose a custom From address while composing
picks which alias or delegated address the mail is sent from
…and 11 more at this level
Wrap the selected text in a quote block while composing
sets quoted text off in a clean blockquote for replies
…and 20 more at this level
How graduation works. Drill until every move in the deck holds at ≥95% first-try, under 800ms median, across two separate days. Then the deck is done — and you get a certificate stating exactly that, plus a LinkedIn credential in one click.