Did you know that Microsoft Outlook will calculate future dates for you easily? In a new Appointment or Task, you can type 30d and when you hit tab, the date displayed is 30 days from today. Even more interesting is that you can type phrases like "45 days from April 25th" and it will calculate those dates as well. A tip of the hat to both Adriana Linares and Brian Peterson who posted a comment to her post on the topic.
And, of course I just have to say it, you really should be using a legal specific practice management program for calendaring rather than Outlook.