[senjin]

I use !$ multiple times every day but you just helped me make the connection to try !^ for the first argument and I think I'm going to start using that as well. Thanks!

[schoen]

There is also "!!" for the entire prior command line. Someone elsewhere in this thread mentioned the usefulness of

  sudo !!

for "run the entire previous command under sudo".

Another example could be

  echo "!!" > myscript

for "save the previous command into the file myscript".

[senjin]

I also use cat `which !!` every once in a while

[aasasd]

At least in zsh, there are also !:1 for the first argument, et cetera with the rest of natural numbers, and something like !:* for all the arguments without the command.

The generic form is !n:m for n-th last command line and m-th argument, with an omitted n being a shortcut for the last line.

Not sure if all of this works the same in bash.

[senjin]

I use zsh so this is also going in my toolbox. I think I've reached for !:* in the past and didn't know it so this is useful