Being rather lazy, I love using User Tools which other people have made available:
ClefChange.php by Bryan Creer (eg. Changing Violin 3 parts to Cello)
EmptyBars.vbs by Peter Edwards (eg. Create a Tempo staff which goes to the top of my score
and contains all the tempo info)
GlobalMod by Andrew Purdam ---Used literally in dozens of "Toollets"
MultiBarRests by Kjeld Hansen (Automatically calculates and supplies MBRs throughout a staff in seconds)
.........will have to continue later.
Other User tools which I regularly use:
Parts (adp) by Andrew Purdam (To split out multiple voices on one staff into separate voices, each copied to its own staff)
Ranges (adp) by Andrew Purdam (To report the lowest and highest note present in a staff)
XNoteSpace_NOTEs_CHORDs_adp by Andrew Purdam (To add extra note space to selected Note(s) and/or Chords) Very useful to nudge a note or chord.
Be careful to select before running. Otherwise you'll need a quick Ctrl-Z to undo the action which this tool would've applied to the whole staff.
To translate MXML output from SHARPEYE2 to NWC2: MXML2NWCC.exe by Nicolas Hatier
I keep the whole orchestral score in one NWC2 file,
therefore I frequently use Visibility "Top Staff Only" and copy down through the file those things which the conductor would ONLY want to see on the top staff,
but are required by each orchestra member.
This allows me to adjust individual parts for best printing, which is my priority.