regularmaint.sh

#!/bin/bash

# get rid of duplicate apps by reindexing
/System/Library/Frameworks/CoreServices.framework/Frameworks/LaunchServices.framework/Support/lsregister -kill -seed -r -domain local -domain system -domain user

# reindex mail
rm $HOME"/Library/Mail/v2/MailData/Envelope Index"
rm $HOME"/Library/Mail/v2/MailData/Envelope Index-shm"
rm $HOME"/Library/Mail/v2/MailData/Envelope Index-wal"

# cleanup downloaded mail attachments (you can always redownload later)

rm -r $HOME"/Library/Mail Downloads/"

# make Library visible

chflags nohidden $HOME/Library

# clean up my Desktop

mv $HOME/"Desktop/*"  $HOME"/Documents/Temporary Files/"

# repair permissions
# run diskutil list to get the name of your partitions

diskutil repairPermissions disk4



# clear out caches

rm -r $HOME"/Library/Caches/*"

sudo rm -r /Library/Caches/*

Nice script, I forked it and added a few things I had in a similar script of mine.