When I'm showing people the power of vim, I often use the `i` verb, like `ci"` and how it's not a "shortcut" but instead a sentence: change in quotes. If you start thinking about vim as a language instead of a collection of things to memorize, it becomes much easier, IMO.

Maybe one lesser known is changing to visual mode within operation. A few examples (^ marks the cursor):

    one two three
                ^

'db' would leave letter "e" behind. But 'dvb' would include the "e" as well.

Another example, say we want to delete from "two" to "five".

    one
    two
     ^
    three
    four
    five
    six

'd/five' would leave a "t" as well as "five", but 'dV/five' would delete all necessary lines. This helps targeting lines without using relative line numbers.

sometimes when I copy data into a file, I get some blank lines depending on how the data was formatted. This can often happen when copying from websites.

I find this shortcut useful to delete all blank lines in a file

:g/^$/d

To add to this, I would say :g in combination with :norm would be my choice.

Edit: Oh, also, since vim ships with xxd: xxd -r -p is a very useful thing to know.

:Lexplore opens a split window with a directory listing you can navigate.

:33Lexplore opens the split with a slimmer, 33% width, window. :Lex<tab> to autocomplete if you do not want to type as much.

I never know what is lesser known but my faviourite is: * searches for the word under the cursor, # searches backwards. You can also use n for next and N for previous hit.

not a shortcut but still tremendously useful when I need it:

    # open some files in vertical splits

    > ls $FILES | nvim -O

    # -o does horizontal splits

nvim -o $FILES