That I'm trying to re-learn now.

Nav

• M-p f - projectile find file

Xref (using dump-jump)

• M-. xref-find-definitions
• M-? xref-find-references
• n, p
• M-, back to where invoked

Magit

• C-c s or C-x g - magit-status
• TAB show/hide
• RET default action
• l l log
• Changes
  • s stage chunk, u unstage, S or U for all.
  • - (repeated) to smaller chunks, + to larger
  • c c commit
• Pull/push
  • F p fetch pull
  • P u or P p push