Seems like it might be easier, and infinitely more adjustable to use Excel for this. It woul dbe something that you would have to check everyday versus a new message or appointment alert. But, with simple formula's to conditionally format data based on dates, quick sorting, hiding and unhiding that are easily implemented (with a little bit of experimentation), it's hard to beat it.
Excel is available online, too, for free. And yes, it is the most inappropriately used software ever invented but hey, it's like aspirin --it just works.