Here are a number of tricks in core Vim I've found useful over the years:
CTRL-p completion - it just completes identifiers in the current file (well, you can enable it to complete more things via the complete option), but often that's good enough!
Speaking of completion, there are all of the various completions hanging off of CTRL-x - I use CTRL-x CTRL-f to complete filenames all the time, and I use CTRL-x CTRL-l to complete lines way more often than I probably should =)
Using :normal to run Vim commands across an entire file or a selection is really nice - it provides a nice alternative to macros (which are also quite handy)
I use :%!command all the time for arbitrary text processing - especially :%!perl.
Special registers, especially used in combination with CTRL-r, which inserts a register in insert mode:
+/* - clipboard registers
" - last yanked text (useful if you want to type some text, paste what you yanked, and then type a little more)
. - last inserted text (useful if you want to replace different motions with the same text)
= - expression register (useful for things like inserting the current directory with CTRL-r =getcwd())
CTRL-w - current word under the cursor (I use this with :Pydoc CTRL-w to look up the documentation for the word under my cursor)
/ - current search (I will often do a search, and then do /\C<C-r>/ to enable case sensitivity for the current search, or wrap the current search via /\C\<<C-r>\> to search for only the target word and not words containing the search as a substring)
CTRL-f in the command line to open a command line editor, which allows you to fix previous command lines using Vim commands
g-/g+/:earlier/:later to traverse history by time, rather than undo order
Running vim filename +line_num to seek to line_num from the start, and vim filename +/pattern to start searching for pattern from the get-go
>'] to indent the last paste (the [ and ] registers contain the start and end locations of the last changed or yanked text)
And it's not technically a Vim trick, per se, but I like running my shell in Vi mode!
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Here are a number of tricks in core Vim I've found useful over the years:
CTRL-pcompletion - it just completes identifiers in the current file (well, you can enable it to complete more things via thecompleteoption), but often that's good enough!CTRL-x- I useCTRL-x CTRL-fto complete filenames all the time, and I useCTRL-x CTRL-lto complete lines way more often than I probably should =):normalto run Vim commands across an entire file or a selection is really nice - it provides a nice alternative to macros (which are also quite handy):%!commandall the time for arbitrary text processing - especially:%!perl.CTRL-r, which inserts a register in insert mode:+/*- clipboard registers"- last yanked text (useful if you want to type some text, paste what you yanked, and then type a little more).- last inserted text (useful if you want to replace different motions with the same text)=- expression register (useful for things like inserting the current directory withCTRL-r =getcwd())CTRL-w- current word under the cursor (I use this with:Pydoc CTRL-wto look up the documentation for the word under my cursor)/- current search (I will often do a search, and then do/\C<C-r>/to enable case sensitivity for the current search, or wrap the current search via/\C\<<C-r>\>to search for only the target word and not words containing the search as a substring)CTRL-fin the command line to open a command line editor, which allows you to fix previous command lines using Vim commandsg-/g+/:earlier/:laterto traverse history by time, rather than undo ordervim filename +line_numto seek toline_numfrom the start, andvim filename +/patternto start searching forpatternfrom the get-go>']to indent the last paste (the[and]registers contain the start and end locations of the last changed or yanked text)And it's not technically a Vim trick, per se, but I like running my shell in Vi mode!