I'm going to be doing this from now on. Writer Jamie Rubin takes the idea of reviews from Getting Things Done and applies it to his use of Evernote:
I spend maybe 5 minutes on this a night and it helps ensure that I recall what came into Evernote that day, and gives me an opportunity to review it and process it in some tangible way.
The reason I'll do this now is that my Evernote inbox currently has 240 notes in it and while a lot are still in play, many can be squirrelled away and I want to. I'm not sure why I want to: there is no reason I can't just let the inbox fill up forever yet I am compelled to sort it out a little bit. Last night I had a look, saw this mass of notes, started dragging a few to notebooks, got very bored, gave up.
But just as I know I feel better when my email inbox is empty, I know I'll feel more in control if I do that with Evernote too. Plus, my beloved To Do manager OmniFocus has an inbox and you get into the habit of firstly chucking anything and everything in there, then later parcelling it out to different places. This task is one for the Writers' Guild, that one's for a particular project. This one has to be done on Wednesday but with that one it doesn't matter when I do it, it's just got to be done.
There is definitely a psychological aspect to this in that I feel better when the inbox is empty and all my tasks are off in their corners. But there is also a demonstrable practical effect in that it means on Wednesday I know I will see that task I need to do. I won't have to think about it at all on Monday or Tuesday, not even for the pixel of a second it would take to see it in the list and think no, that's not for today. It's gone until I need it. Equally, I have a project I've got to look at on Monday this week and I can just open up that project in OmniFocus and know that I'm seeing everything to do with it.
So keeping on top of stuff like this is demonstrably useful in OmniFocus, it feels psychologically useful in my Mail, I'm confident it'll work for me in Evernote too.