Search folder for overdue items

[gordonah]

I add reminders to a lot of mails as they come on, along with a due date, as
it greatly helps me organise my workload.
Although I can scan through the "For Follow up" folder to see what is
appearing as Red (for overdue items), I would like to create a customised
search folder that only contains overdue items, but I can't work it out.
I'm trying 'New search folder', 'Customised search folder' and then I can't
identify what I can do (if anything).
I suppose what I want is along the lines of 'Due date' 'On or before'
yesterday, but I'm unable to set up yesterday as a variable value .(works
fine setting a date of course).
Any ideas?

I'm using Outlook 2003 sp2 on XP.

Thanks in advance.