The watch command is one of my favorite commands. Sometimes, it may be helpful to watch active queries pop in and out, and the watch command can do that for you!
#~ watch "mysqladmin -u admin -p'`cat /etc/psa/.psa.shadow`' processlist"
I do a lot of Virtuozzo work so this example is somewhat tailored towards that, but the command will work for any mysql use case. Just simply assign the appropriate user id to the -u option, and supply nothing to the -p option if you wish to enter the password such that it isn't viewable to other users who may look at the bash history!