glob

A relatively unknown batch file utility which ships with Windows (Vista) is forfiles:

Selects a file (or set of files) and executes a command on that file. This is helpful for batch jobs.

On all of my workstations I have a task scheduled to run nightly:

forfiles /p "%TEMP%" /m *.* /s /d -28 /c "cmd /c if @isdir==TRUE (echo rmdir @path) else (echo del /q @path)"

This deletes all files from my temp directory older than 28 days.

I used to have a Perl script that does this, and I’ve seen this done with complicated for syntax, however this doesn’t require anything to be installed, and is much simpler

According to the help for pushd:

Stores the current directory for use by the POPD command, then changes to the specified directory.

Generally you use it like:

C:\>pushd c:\windows\system32
c:\Windows\System32>rem blah
c:\Windows\System32>popd
C:\>

Not very exciting.

However pushd has a little known feature; you can dynamically map UNC paths:

C:\>pushd \\server\netlogon
Z:\>rem blah
Z:\>popd
C:\>

In this case pushd finds the first available drive letter (working backwards from Z:), maps a network drive, and changed the current working directory to it.  popd then unmaps the network drive.

This makes is a very handy tool for batch scripting, including in login scripts.