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+I regularly switch between exactly two things while working,
+a "current" and an "alternate" item; a lot of tools I use
+seem to support this flow.
+
+#### git
+
+Pass `-` to `git-checkout` to switch to the previously
+active branch:
+
+```bash
+$ git branch
+* foo
+  bar
+
+$ git checkout bar
+$ git branch
+  foo
+* bar
+
+$ git checkout -
+$ git branch
+* foo
+  bar
+```
+
+#### bash - cd
+
+This may not be exclusive to `bash`:
+
+```bash
+~/foo $ cd ~/bar
+~/bar $ cd -
+~/foo $
+```
+
+This is especially handy in combination with my [git-worktree
+flow](../curing_a_case_of_git-UX/):
+
+```bash
+~/main-branch $ gwj feature
+~/feat-branch $ cd -
+~/main-branch $
+```
+
+#### bash - jobs
+
+I often suspend multiple `vim` sessions with `Ctrl-Z`:
+
+```bash
+$ jobs
+[1]+  Stopped                 vim transpiler/src/transform.rs
+[2]-  Stopped                 git commit --verbose
+```
+
+In the above example: I suspended `vim` when working on
+`transform.rs`, and then began working on a commit by
+running `git commit` without a message flag (lets you craft
+a message in `$EDITOR`). To bring the current job to the
+foreground, you can use `fg`:
+
+```bash
+$ fg
+```
+
+With a job identifier:
+
+```bash
+$ fg %2    # resumes interactive git commit
+```
+
+Or switch to "last" job, or the second-most-recently-resumed
+job:
+
+```bash
+$ fg %-
+$ %-      # shorthand
+
+```
+
+#### vim
+
+Switch to the last active buffer with `Ctrl+^`. In
+command-mode, `#` refers to the last active buffer, you can
+use this as an argument to a few commands:
+
+```vimscript
+:b#      " switch to alternate buffer (same as Ctrl+^)
+:vsp#    " create a vertical split with the alternate buffer
+:read#   " read contents of alternate buffer into current buffer
+:!wc #   " pass file name of alternate buffer to the command `wc`
+```
+
+See `:help c_#` for more.
+
+#### tmux
+
+Switch to the last active tmux session with
+`<prefix>+shift+L`.
+
+#### qutebrowser
+
+Switch to the last active tab with `g$`.