Its very easy using the Filter feature of SharePoint views to show only items completed in the last 30 days or items due in the next X days; for example :-
Completed >= [Today]-30
On the Advanced SharePoint View and Filter techniques post Ed asked how you could filter for the current calendar month rather than a rolling 30 day period (for example all tasks due this calendar month).
Like all great questions it seemed simple enough – something like only showing items where the Month and Year of the due date = the Month and Year of the current date.
