If it's something you need to do then there is no point in putting it in a folder, whether by a filter or manually, just do it right away.
And in the real world...
Quarterly psp files, if it's a CC, drag straight to psp.
If direct to you read, action & drag to psp.
I get 60-90 a day.
A lot of mine simply don't get read first time around.
Sad fact, but that's life (work).
If I get stressed I close Outlook, no messing.
And that daft Lync communicator, that lets folk instant message you...
The sharing screens is handy though.
The worst thing...
Folk that ring up, & say
"I've sent you an email..".(then pause), expecting you to read it right away...grrrr.
And folk that just walk up & stand by your desk, wether your on the phone, or busy working, & just stand there...
I take great pleasure in totally ignoring them
God, I'm a grump bugger.