Need to clean up directories that are clogged up with too many old files, and to do this automagically? If you're using a Windows box try my TidyUp script. Here's an example:

cscript tidyup.vbs -f c:\temp -d 20 -i "log|bak|tmp"

This will delete all .log, .bak, and .tmp files in c:\temp. If you want to delete all files in c:\temp, omit the -i parameter. If you aren't sure about the effects of your command, just append the -a parameter that does everything but delete the files. Just read the manual and copy the code.